eTap AXS HRD Caliper, Hose Replacement,

and Lever Replacement

SERVICE MANUAL

GEN.0000000005964 Rev J © 2022 SRAM, LLC

SRAM LLC WARRANTY
THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AGAINST SRAM, LLC. YOU MAY ALSO HAVE OTHER RIGHTS THAT VARY FROM
STATE TO STATE, COUNTRY, OR PROVINCE. THIS WARRANTY DOES NOT AFFECT YOUR STATUTORY RIGHTS. TO THE EXTENT THIS
WARRANTY IS INCONSISTENT WITH THE LOCAL LAW, THIS WARRANTY SHALL BE DEEMED MODIFIED TO BE CONSISTENT WITH SUCH
LAW. FOR A FULL UNDERSTANDING OF YOUR RIGHTS, CONSULT THE LAWS OF YOUR COUNTRY, PROVINCE, OR STATE.
THIS WARRANTY APPLIES TO SRAM PRODUCTS MADE UNDER THE SRAM, ROCKSHOX, TRUVATIV, ZIPP, QUARQ, AVID AND TIME
BRAND NAMES.
EXTENT OF LIMITED WARRANTY
Except as otherwise set forth herein, SRAM warrants its bicycle components to be free from defects in materials or workmanship for a period of two
(2) years after original purchase of the product.
SRAM warrants all Zipp MOTO Wheels and Rims to be free from defects in materials or workmanship for the lifetime of the product.
SRAM warrants all non-electronic Zipp branded bicycle components, Model Year 2021 or newer, to be free from defects in materials or workmanship
for the lifetime of the product.
GENERAL PROVISIONS
This warranty only applies to the original owner and is not transferable. Claims under this warranty must be made through the retailer where the
bicycle or the SRAM product was purchased or a SRAM authorized service location. Original proof of purchase is required. All SRAM warranty claims
will be evaluated by a SRAM authorized service location whereupon acceptance of the claim the product will be repaired, replaced, or refunded at
SRAM's discretion. To the extent allowed by local law claims under this warranty must be made during the warranty period and within one (1) year
following the date on which any such claim arises.
NO OTHER WARRANTIES
EXCEPT AS DESCRIBED HEREIN, AND TO THE EXTENT ALLOWED BY LOCAL LAW, SRAM MAKES NO OTHER WARRANTIES, GUARANTIES, OR
REPRESENTATIONS OF ANY TYPE (EXPRESS OR IMPLIED), AND ALL WARRANTIES (INCLUDING ANY IMPLIED WARRANTIES OF REASONABLE
CARE, MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE) ARE HEREBY DISCLAIMED.
LIMITATIONS OF LIABILITY
EXCEPT AS DESCRIBED HEREIN, AND TO THE EXTENT PERMITTED BY LAW, IN NO EVENT SHALL SRAM OR ITS THIRD PARTY SUPPLIERS BE
LIABLE FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES. SOME STATES (COUNTRIES AND PROVINCES) DO NOT
ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL DAMAGES, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
LIMITATIONS OF WARRANTY
This warranty does not apply to products that have been incorrectly installed, adjusted, and/or maintained according to the respective SRAM user
manual. The SRAM user manuals can be found online at sram.com/service.
This warranty does not apply to damage to the product caused by a crash, impact, abuse of the product, non-compliance with manufacturer's
specifications of intended usage, or any other circumstances in which the product has been subjected to forces or loads beyond its design.
This warranty does not apply when the product has been modified, including but not limited to, any attempt to open or repair any electronic and
electronic related components, including the motor, controller, battery packs, wiring harnesses, switches, and chargers.
This warranty does not apply when the serial number or production code has been deliberately altered, defaced, or removed.
SRAM components are designed for use only on bicycles that are pedal powered or pedal assisted (e-Bike/Pedelec).
Notwithstanding anything else set forth herein, the battery pack and charger warranty does not include damage from power surges, use of improper
charger, improper maintenance, or such other misuse.
This warranty shall not cover damages caused by the use of parts of different manufacturers or parts that are not compatible or suitable for use with
SRAM components.
This warranty shall not cover damages resulting from commercial (rental) use.
WEAR AND TEAR
This warranty does not apply to normal wear and tear. Wear and tear parts are subject to damage as a result of normal use, failure to service
according to SRAM recommendations, and/or riding or installation in conditions or applications other than recommended.
WEAR AND TEAR PARTS INCLUDE:
• Aero bar pads • Chains • Jockey wheels • Sprockets
• Air sealing o-rings • Cleats • Rear shock mounting • Stripped threads/bolts (aluminum,
• Batteries • Corrosion hardware and main seals titanium, magnesium or steel)
• Bearings • Disc brake rotors • Rubber moving parts • Tires
• Bottomout pads • Dust seals • Shifter and Brake cables • Tools
• Brake pads • Free hubs, Driver bodies, Pawls (inner and outer) • Transmission gears
• Bushings • Foam rings, Glide rings • Shifter grips • Upper tubes (stanchions)
• Cassettes • Handlebar grips • Spokes • Wheel braking surfaces

ZIPP IMPACT REPLACEMENT POLICY

Zipp branded products, Model Year 2021 or newer, are covered under a lifetime impact-damage replacement policy. This policy can be used to obtain
a replacement of a product in the event of non-warranty impact damage occurring while riding your bicycle. See www.zipp.com/support for more
information.
 SAFETY FIRST!
We care about YOU. Please, always wear your safety glasses
and protective gloves when servicing SRAM products.
Protect yourself! Wear your safety gear!
TABLE OF CONTENTS
SRAM ETAP AXS HYDRAULIC BRAKE SYSTEMS...........................................................................................................................................5

TROUBLESHOOTING...........................................................................................................................................................................................6
DISC BRAKE PAD ADVANCEMENT PROCEDURE..................................................................................................................................................................................6
DISC BRAKE PAD GAP RESET .....................................................................................................................................................................................................................9
DISC BRAKE PAD RETRACTION RESET - MONOBLOCK CALIPER ONLY.....................................................................................................................................9

SRAM ETAP AXS HRD CALIPER SERVICE......................................................................................................................................................10

PARTS, TOOLS AND SUPPLIES.................................................................................................................................................................................................................. 10
ETAP AXS HRD CALIPER EXPLODED VIEW - 2 PIECE CALIPER (FLAT MOUNT)....................................................................................................................... 10
ETAP AXS HRD CALIPER EXPLODED VIEW - 2 PIECE CALIPER (POST MOUNT)....................................................................................................................... 11
ETAP AXS HRD CALIPER EXPLODED VIEW - MONOBLOCK CALIPER (FLAT MOUNT)............................................................................................................ 11
CALIPER BRAKE PAD REMOVAL................................................................................................................................................................................................................ 12
CALIPER PISTON REMOVAL........................................................................................................................................................................................................................ 13
CALIPER PISTON INSTALLATION.............................................................................................................................................................................................................. 19

SRAM ETAP AXS HRD HOSE REPLACEMENT.............................................................................................................................................. 23

PARTS, TOOLS AND SUPPLIES................................................................................................................................................................................................................. 23
HOSE REMOVAL............................................................................................................................................................................................................................................. 23
HOSE INSTALLATION................................................................................................................................................................................................................................... 26

SRAM ETAP AXS HRD STEALTH-A-MAJIG HOSE HOOD REPLACEMENT.............................................................................................. 30

PARTS, TOOLS AND SUPPLIES................................................................................................................................................................................................................. 30
STEALTH-A-MAJIG HOSE HOOD EXPLODED VIEW.......................................................................................................................................................................... 30
HOSE REMOVAL.............................................................................................................................................................................................................................................. 31

RED ETAP AXS AND FORCE ETAP AXS LEVER AND ELECTRONIC SUBASSEMBLY REPLACEMENT............................................... 34
PARTS, TOOLS AND SUPPLIES................................................................................................................................................................................................................. 34
RED ETAP AXS/ FORCE ETAP AXS EXPLODED VIEW....................................................................................................................................................................... 34
RED ETAP AXS AND FORCE ETAP AXS LEVER REMOVAL.............................................................................................................................................................. 35
RED ETAP AXS AND FORCE ETAP AXS LEVER INSTALLATION..................................................................................................................................................... 38

RIVAL ETAP AXS LEVER AND ELECTRONIC SUBASSEMBLY REPLACEMENT....................................................................................... 41

PARTS, TOOLS AND SUPPLIES.................................................................................................................................................................................................................. 41
RIVAL ETAP AXS EXPLODED VIEW.......................................................................................................................................................................................................... 41
RIVAL ETAP AXS LEVER REMOVAL......................................................................................................................................................................................................... 42
RIVAL ETAP AXS LEVER INSTALLATION................................................................................................................................................................................................ 45
 S R A M eTa p A X S H y d r a u l i c B r a k e S y s t e m s
We recommend that you have your SRAM eTap AXS components serviced by a qualified bicycle mechanic. Servicing SRAM components requires
knowledge of bicycle mechanics as well as the special tools and lubricants/fluids used for service.
SRAM brake systems need to be serviced periodically to optimize braking function. If brake fluid is leaking from any area of the brake there may be
damage or wear and tear to the internal moving parts. If the system has been contaminated with the wrong fluid there may be damage to all rubber
and plastic internal parts. If your brake was damaged in a crash, there may be damage to the lever blade, pushrod, and housing assemblies. Inspect
and replace these parts to restore proper brake function.
Visit www.sram.com/service for the latest SRAM Spare Parts catalog and technical information. For order information, please contact your local SRAM
distributor or dealer.
For recycling and environmental compliance information, please visit www.sram.com/en/company/about/environmental-policy-and-recycling.
Information contained in this publication is subject to change at any time without prior notice. Your product's appearance may differ from the pictures
contained in this publication.

SAFETY INSTRUCTIONS
Do not use mineral oil or DOT 5 fluid. If the brake system has been contaminated with mineral oil or DOT 5 fluid, the braking system (e.g. the
brake-shift lever, caliper, and hose) will need to be replaced.
For best results, use only SRAM High-Performance DOT 5.1 brake fluid. If SRAM brake fluid is not available, only use DOT 5.1 or 4 brake fluid.
Use only DOT compatible grease.
Always wear safety glasses and nitrile gloves when working with DOT brake fluid.
Used DOT brake fluid should be recycled or disposed of in accordance to local and federal regulations.
Never pour DOT brake fluid down a sewage or drainage system or into the ground or a body of water.
Do not allow any brake fluid to come in contact with the brake pads. If this occurs, the pads are contaminated and must be replaced.
Place an oil pan on the floor underneath the area where you will be working on the brake.
Servicing your brakes removes all of the brake fluid from the system. You must bleed your brakes after you service the brake caliper. Consult the
eTap AXS HRD Hose Shortening and Bleed Manual at www.sram.com/service.

⚠ WARNING
Do not remove the reservoir bolts on the eTap AXS hood. Bolts that have been removed and reinstalled will damage the hood assembly and make
the brakes unsafe to use, which could lead to serious injury and/or death.

Do Not Remove

NOTICE
Before beginning service, thoroughly clean the exterior of the product to avoid contamination of internal sealing part surfaces.
DOT brake fluids will damage painted surfaces. If any fluid comes in contact with a painted surface (e.g. your frame) or printing on the brakes, wipe
it off immediately and clean it with isopropyl alcohol or water. Damage to painted and/or printed surfaces by DOT brake fluid is not covered under
warranty.
When using a crowfoot socket and torque wrench, install the crowfoot socket at 90 degrees to the torque wrench.

SRAM eTap AXS Hydraulic Brake Systems 5

 Tr o u b l e s h o o t i n g
Disc Brake Pad Advancement Procedure

NOTICE
Do not apply DOT brake fluid or grease to caliper pistons when performing troubleshooting procedures. Use of DOT brake fluid or grease can
diminish braking performance and cause rotor rubbing.

If your brakes exhibit excessive lever throw or spongy feel, perform the following steps before bleeding the system:

1 Clamp the bicycle into a bicycle work stand and remove the wheel
according to the wheel manufacturer's instructions.

Bicycle work stand

2 Remove the brake pads and install the pad spacer. 2.5 mm

Needle-nose pliers

3 Squeeze the brake lever several times until both pistons have
advanced and contact the pad spreader. One piston may move faster
than the other; continue to squeeze the lever until the second piston
touches the spacer.

Troubleshooting 6
4 Remove the pad spacer.

5 Use a plastic tire lever to push the pistons back into the caliper bores. Tire lever
Repeat steps 3-5 until both pistons move freely.

Tire lever

6 Reinstall the brake pads and install the wheel according to the
manufacturer's instructions.

SRAM eTap AXS Hydraulic Brake Systems 7

7 Loosen the caliper bolts.
Lightly squeeze (approx. 4 lbs) the brake lever several times to position
the brake pads to the proper distance from the rotor.
Center the caliper on the rotor, and tighten.

T25

T25 5 N·m (44 in-lb) 22 m

8 Spin the wheel and check the brake function. The pistons should move
freely and there should not be excessive brake lever throw.

9 If there is no improvement in the brake function, proceed to

Caliper Service.

SRAM eTap AXS Hydraulic Brake Systems 8

 Disc Brake Pad Gap Reset
NOTICE
Do not apply DOT brake fluid or grease to caliper pistons when performing troubleshooting procedures. Use of DOT brake fluid or grease can
diminish braking performance and cause rotor rubbing.

If the brake lever was squeezed without a pad spacer or rotor installed in the caliper, the pad gap may have been reduced. If this happens the rotor
might not have enough clearance in the caliper without rubbing. Perform this procedure to reset the pad gap:
Remove the wheel from the affected caliper.
1
2 Install the thicker side of a 2 piece caliper pad spacer or a Monoblock
pad spacer between the brake pads.

3 Squeeze the brake lever hard 5 times (approximately 22 lbs).

4 Remove the spacer from the caliper, and install the thinner side of the
SRAM spacer between the brake pads.

5 Squeeze the brake lever lightly 5 times (approximately 4 lbs or less).

6 Remove the pad spacer.

2.4 mm side Monoblock pad spacer 3.8 mm side

7 Re-install the wheel, and re-center the caliper.

1.85 mm side 2 piece pad spacer 2.8 mm side

Disc Brake Pad Retraction Reset - Monoblock caliper only

NOTICE
Do not apply DOT brake fluid or grease to caliper pistons when performing troubleshooting procedures. Use of DOT brake fluid or grease can
diminish braking performance and cause rotor rubbing.

If there is still insufficient clearance between the brake pads and rotor after performing the pad gap reset procedure, perform this overnight procedure
to reset the retraction distance between the caliper pistons:

1 Remove the wheel from the affected caliper.

2 Install the 3.8 mm side of a Monoblock pad spacer between the brake
pads and remove it without squeezing the brake lever.

3 Install the 2.4 mm side of the Monoblock pad spacer between the
brake pads.

4 Squeeze the brake lever lightly 5 times (approximately 4 lbs or less).

5 Allow the system to sit, untouched, for 12-24 hours.

6 Remove the pad spacer.

2.4 mm side Monoblock pad spacer 3.8 mm side

7 Re-install the wheel, and re-center the caliper.

Disc Brake Pad Gap Reset 9

S R A M eTa p A X S H R D C a l i p e r S e r v i c e
P a r t s , To o l s a n d S u p p l i e s
Parts Bicycle Tools
• Caliper Piston Kit - eTap AXS Phen. B1 (2 piece calipers) • Bicycle work stand
• Caliper Piston Kit - eTap AXS Monoblock (Monoblock calipers) Common Tools
• Caliper Piston Kit - Level Ultimate/TLM Phen. B1 • Air compressor with rubber-tipped air chuck nozzle
(2 piece calipers)
• Digital caliper
Safety and Protection Supplies
• Hex wrench: 2.5 mm
• Apron
• Hex bit socket: 2.5 mm
• Clean, lint-free shop towels
• Needle nose pliers
• Nitrile gloves
• Pick
• Oil pan
• Soft rubber or piece of inner tube
• Safety glasses
• Torque wrench
Lubricants and Fluids
• TORX wrench: T25
• Isopropyl alcohol
• TORX bit socket: T25
• SRAM DOT 5.1 Brake Fluid
If SRAM brake fluid is not available, only use DOT 5.1 or 4 brake fluid
• SRAM DOT assembly grease
SRAM Tools
• Level/AXS Caliper Piston Removal Tool
• HRD Bleed Block (2 piece calipers)
• Monoblock Bleed Block (Monoblock calipers)
• Monoblock caliper 21 mm Piston Removal Tool
• Piston plug

eTa p A X S H R D C a l i p e r E x p l o d e d V i e w - 2 p i e c e c a l i p e r ( f l a t m o u n t )

Hose

Pad retention bolt

Hose Boot
Brake pads

Caliper body seal

Compression Nut
Caliper piston
Caliper half
Compression Fitting
Piston seal

Cross-body bolt

Piston seal
Caliper
body seal Caliper piston

Caliper half
E-clip
Cross-body
bolt

SRAM eTap AXS HRD Caliper Service 10

eTa p A X S H R D C a l i p e r E x p l o d e d V i e w - 2 p i e c e c a l i p e r ( p o s t m o u n t )

Pad retention bolt Hose

H-Spring
Brake pads
Caliper body seal Hose Boot
Caliper piston

Piston seal
Compression Nut

Caliper half Compression Fitting

Cross-body bolt

Piston seal
Caliper body seal
Caliper piston

Caliper half E-clip

Cross-body bolt

eTa p A X S H R D C a l i p e r E x p l o d e d V i e w - M o n o b l o c k c a l i p e r ( f l a t m o u n t )

Hose
E-clip

Caliper Banjo

Piston seal Banjo bolt

Brake pads

Piston seal
Caliper piston

Caliper piston

Pad
retention
bolt

eTap AXS HRD Caliper Exploded View - 2 piece caliper (post mount) 11
Caliper Brake Pad Removal
1 Remove the caliper from the frame, then remove the mounting bracket
and the hardware from the caliper. Set them aside in the order that they
were removed.

2 Remove the E-clip from the pad retention bolt, then remove the pad
retention bolt from the caliper.
Needle nose pliers Monoblock caliper

Needle nose pliers 2 piece caliper

2.5 mm Monoblock caliper

2.5 mm 2 piece caliper

3 Remove the brake pads from the caliper. Monoblock caliper

NOTICE
Brake pads must be replaced if the total thickness of the backing
plate and pad friction material is less than 3 mm.

2 piece caliper

Digital caliper

Caliper Brake Pad Removal 12

Caliper Piston Removal

NOTICE
DOT brake fluid will damage painted surfaces. If any fluid comes in contact with a painted surface (e.g. your frame) or printing on the brakes, wipe
it off immediately and clean it with isopropyl alcohol or water. Damage to painted and/or printed surfaces by DOT brake fluid is not covered under
warranty.

1 2 piece caliper: Remove the compression nut and hose. T25 Monoblock caliper
Monoblock caliper: Remove the banjo bolt and hose.

NOTICE
Fluid will drip. Place an oil pan and/or shop towel under the hose.

8 mm flare wrench 2 piece caliper

2 2 piece caliper: Insert the Level / AXS Caliper Piston Removal Tool.

Piston Removal Tool 2 piece caliper

Monoblock caliper: Insert the Monoblock caliper 21 mm Piston 2.5 mm Monoblock caliper
Removal Tool, then install the pad retention bolt into the caliper.

⚠ CAUTION
Monoblock caliper: The pad retention bolt must be installed. If
the pad retention bolt is not installed, the piston removal tool may
dislodge rapidly from the caliper, which can lead to bodily injury or
damage to the parts.

Piston Removal Tool Monoblock caliper

Caliper Piston Removal 13

3 Firmly press a rubber-tipped air chuck nozzle into the banjo port. Hold
the caliper securely against a rubber surface and force air into the
banjo port to dislodge the piston from the caliper.

⚠ CAUTION - EYE HAZARD

Wear safety glasses. The caliper piston may dislodge rapidly from the
caliper, which can lead to bodily injury or damage to the parts. Point
the caliper piston toward a rubber surface to prevent the piston from
becoming a projectile.

Rubber-tipped air chuck nozzle 2 piece caliper

Rubber-tipped air chuck nozzle Monoblock caliper

4 Monoblock caliper: Remove the pad retainer bolt.

2.5 mm Monoblock caliper

5 Remove the piston and the piston removal tool from the caliper. Piston Removal Tool Monoblock caliper

Piston Removal Tool 2 piece caliper

Piston Removal Tool Monoblock caliper

Caliper Piston Removal 14

6 Insert the piston plug so that it fits snugly into the empty piston bore
and is flush with the inside of the caliper.
Piston plug Monoblock caliper

Piston plug 2 piece caliper

7 Insert the Level / AXS Caliper Piston Removal Tool (2 piece caliper) or
the Monoblock caliper 21 mm Piston Removal Tool (Monoblock caliper)
so that it will capture the still-installed piston. Make sure the horseshoe
opening is aligned with the tab on the piston plug.

Piston Removal Tool 2 piece caliper

Monoblock caliper: Install the pad retention bolt to hold the piston 2.5 mm Monoblock caliper
removal tool in place.

⚠ CAUTION
The pad retention bolt must be installed. If the pad retention bolt is
not installed the piston removal tool may dislodge rapidly from the
caliper, which can lead to bodily injury or damage to the parts.

Piston Removal Tool Monoblock caliper

Caliper Piston Removal 15

8 Firmly press a rubber-tipped air chuck nozzle into the banjo port. Hold
the caliper securely against a rubber surface and force air into the
banjo port to dislodge the piston from the caliper.

⚠ CAUTION - EYE HAZARD

Wear safety glasses. The caliper piston may dislodge rapidly from the
caliper, which can lead to bodily injury or damage to the parts. Point
the caliper piston toward a rubber surface to prevent the piston from
becoming a projectile.

Rubber-tipped air chuck nozzle 2 piece caliper

Rubber-tipped air chuck nozzle Monoblock caliper

9 Monoblock caliper: Remove the retention bolt.

2.5 mm Monoblock caliper

Caliper Piston Removal 16

10 Remove the piston removal tool, the piston, and the piston plug from
the caliper.
Piston Removal Tool Monoblock caliper

Piston Removal Tool Monoblock caliper

Piston plug Monoblock caliper

Piston plug 2 piece caliper

11 2 piece caliper: Remove the cross-body bolts from the caliper.

Remove the body seals from the caliper body.

T25 2 piece caliper

Caliper Piston Removal 17

12 Remove the piston seals from each piston bore. Pick Monoblock caliper

⚠ CAUTION
Do not scratch the seal gland with the pick. Scratches could cause
fluid to leak when the brake is applied, which will contaminate the
brake pads and could lead to a brake failure.

Pick 2 piece caliper

13 Spray isopropyl alcohol inside each piston bore, the inside and the
outside of the caliper, and all of the removed parts and clean them with
Monoblock caliper

a shop towel.

NOTICE
Do not use mineral oil or DOT 5 fluid. If the brake system has
been contaminated with mineral oil or DOT 5 fluid, the braking
system (e.g. the brake-shift lever, caliper, and hose) will need to be
replaced.
For the best braking performance, use only SRAM DOT 5.1 brake
fluid. If SRAM brake fluid is not available, use only DOT 5.1 or DOT 4
brake fluid.
2 piece caliper

Caliper Piston Removal 18

Caliper Piston Installation
NOTICE
DOT brake fluid will damage painted surfaces. If any fluid comes in contact with a painted surface (e.g. your frame) or printing on the brakes, wipe
it off immediately and clean it with isopropyl alcohol or water. Damage to painted and/or printed surfaces by DOT brake fluid is not covered under
warranty.

1 Apply a small amount of SRAM DOT 5.1 brake fluid to new piston seals
and install the piston seals into each piston bore.
Monoblock caliper

2 piece caliper

2 Inspect the caliper pistons for damage and replace the pistons if
necessary.
Use your gloved finger to apply a small amount of SRAM DOT 5.1 brake
fluid to each piston, then install each piston into each piston bore.

NOTICE
For the best braking performance, use only SRAM DOT 5.1 brake
fluid. If SRAM fluid is not available, use only DOT 5.1 or DOT 4
brake fluid. Do not use grease. Grease will prevent the pistons
from fully retracting into the caliper bores which will reduce braking
performance.

SRAM DOT 5.1 brake fluid

Monoblock caliper

2 piece caliper

Tip: If a piston is difficult to install into a piston bore, lay the caliper on
a flat surface. Slide a thin wrench through the caliper, then gently and
evenly press the piston into the bore.

Caliper Piston Installation 19

3 2 piece caliper: Install new body seals into the caliper body. T25 11 N·m (97 in-lb)
Install the cross-body bolts into the caliper body, then tighten.

2 piece caliper

4 2 piece caliper: Install the hose boot onto the new hose.

2 piece caliper

Apply DOT grease to the hose barb threads. Thread the hose barb into T8
the hose until it is flush with the end of the hose.

NOTICE
Do not overtighten the hose barb. Overtightening may cause
damage to the hose liner.

T8 DOT grease 2 piece caliper

2 piece caliper: Install the compression nut onto the hose. DOT grease 2 piece caliper
Thread the compression fitting over the hose barb, counter-clockwise,
until it is flush or slightly lower than the hose barb.
The compression fitting is reverse threaded.
Apply DOT grease to the outside of the compression fitting and the
threads of the compression nut.

2 piece caliper

Caliper Piston Installation 20

 2 piece caliper: Install the hose into the caliper while threading the 2 piece caliper
compression nut into the caliper by hand. Tighten the compression nut.
Install the hose boot over the compression nut.

8 mm 8 N·m (70 in-lb) 2 piece caliper

Monoblock caliper: Remove the o-rings from the banjo bolt. DOT grease
Install the new o-rings and apply a thin layer of grease. Install the banjo
bolt into the banjo boot.

Monoblock caliper: Tighten the banjo bolt with the banjo boot at the
desired angle.

T25 5 N·m (44 in-lb) Monoblock caliper

5 2 piece caliper: Install the bleed block (11.2 mm) into the caliper. 2.5 mm 2 piece caliper

Bleed block (11.2 mm) 2 piece caliper

Monoblock caliper: Insert the bleed block (11.8 mm) into the caliper, 2.5 mm Monoblock caliper
then install the pad retention bolt.

⚠ CAUTION
You must bleed your brakes before reinstalling the brake pads.
Installing the brake pads prior to bleeding the brakes could
contaminate the brake pads and could lead to brake failure.

Bleed block (11.8 mm) Monoblock caliper

Caliper Piston Installation 21

 6 Spray isopropyl alcohol on the caliper and clean it with a shop towel. Monoblock caliper

2 piece caliper

Visually check your work. If any of the o-rings protrude from the banjo fitting or banjo bolt, remove and replace the o-ring, then repeat the
installation process.

⚠ CAUTION
Servicing your brakes removes all of the brake fluid from the system. You must bleed your brakes after you service the brake caliper. Consult the
eTap AXS HRD Hose Shortening and Bleed Manual at www.sram.com/service.

Caliper Piston Installation 22

 S R A M eTa p A X S H R D H o s e R e p l a c e m e n t
Perform the hose replacement service if the hose needs to be replaced. For hose shortening instructions, consult the eTap AXS HRD Hose Shortening
and Bleed Manual at www.sram.com/service.

P a r t s , To o l s a n d S u p p l i e s
Parts Common Tools
• Disc Brake Hose Hood Assembly - SRAM RED eTap • Crowfoot wrench: 8 mm
Safety and Protection Supplies • Flare nut wrench: 8 mm
• Apron • Hex wrench: 2.5 mm
• Clean, lint-free shop towels • Hex bit socket: 2.5 mm
• Nitrile gloves • Marker
• Oil pan • Needle nose pliers
• Safety glasses • Open end wrench: 10 mm
Lubricants and Fluids • Torque wrench
• Isopropyl alcohol • TORX wrenches: T8, T25
• SRAM DOT assembly grease • TORX bit socket: T25

SRAM Tools
• Monoblock bleed block (Monoblock calipers)
• HRD bleed block (2 piece calipers)
• SRAM hydraulic hose cutter tool

Hose Removal
1 Remove the wheel from the bicycle according to the manufacturer's
instructions.

2 Remove the E-clip from the pad retention bolt, then remove the pad
retention bolt from the caliper.
Needle nose pliers Monoblock caliper

Needle nose pliers 2 piece caliper

2.5 mm Monoblock caliper

2.5 mm 2 piece caliper

SRAM eTap AXS HRD Hose Replacement 23

3 Remove the brake pads from the caliper. Monoblock caliper

NOTICE
Brake pads must be replaced if the total thickness of the backing
plate and pad friction material is less than 3 mm.

2 piece caliper

Digital caliper

4 2 piece caliper: Install the HRD bleed block (11.2 mm) into the caliper. 2.5 mm 2 piece caliper

Bleed block (11.2 mm) 2 piece

Monoblock caliper: Install the Monoblock bleed block (11.8 mm) into 2.5 mm Monoblock caliper
the caliper, then install the pad retention bolt.

Bleed block (11.8 mm) Monoblock

Hose Removal 24
5 Loosen and remove the compression nut and hose from the
valve body.

Flare nut wrench: 8 mm Open end wrench: 10 mm

6 2 piece caliper: Remove the compression nut and hose. T25 Monoblock caliper
Monoblock caliper: Remove the banjo bolt and hose.

NOTICE
Fluid will drip. Place an oil pan and/or shop towel under the hose.

8 mm flare wrench 2 piece caliper

7 Remove the hose from the frame, according to your frame

manufacturer's instructions.
To remove the hose from internally routed frames, first cut the hose
near the compression fitting and remove the compression nut from the
hose.

Hose Removal 25
Hose Installation
1 Internally routed frames: Insert the hose and route it through the
frame or fork.
Externally routed frames: Loosely connect the hose to the frame or
fork.

2 2 piece caliper: Install the hose boot onto the new hose.

2 piece caliper

Apply DOT grease to the hose barb threads. Thread the hose barb into T8 2 piece caliper
the hose until it is flush with the end of the hose.

NOTICE
Do not overtighten the hose barb. Overtightening may cause damage
to the hose liner.

DOT Grease T8 2 piece

2 piece caliper: Install the compression nut onto the hose. DOT grease 2 piece caliper
Thread the compression fitting over the hose barb, counter-clockwise,
until it is flush or slightly lower than the hose barb.
The compression fitting is reverse threaded.
Apply DOT grease to the outside of the compression fitting and the
threads of the compression nut.

2 piece caliper

2 piece caliper: Install the hose into the caliper while threading the 2 piece caliper
compression nut into the caliper by hand. Tighten the compression nut.
Install the hose boot over the compression nut.

8 mm 8 N·m (70 in-lb) 2 piece

Hose Installation 26
 Monoblock caliper: Apply a thin layer of grease to the banjo bolt Monoblock caliper
o-rings, then install the banjo bolt into the new banjo.

DOT grease Monoblock caliper

Monoblock caliper: Tighten the banjo bolt with the banjo boot at the
desired angle.

T25 5 N·m (44 in-lb) Monoblock caliper

3 To shorten the hose, hold the hose up to the shift-brake lever with a
length that creates a gentle bend in the hose and allows the handlebar
to freely turn from side to side.
Mark your cut location, then cut the hose.

NOTICE
You must cut the hose at the lever. Cutting the hose at the caliper
will remove the crimped banjo from the hose, and it will need to be
replaced.

Hydraulic hose cutter

Hose Installation 27
4 Apply grease to the hose barb threads.

DOT grease

5 Thread the hose barb into the hose until it is flush with the end of the
hose.
Install the compression nut onto the hose.

NOTICE
Do not overtighten the hose barb. Overtightening may cause
damage to the hose liner.

T8

6 Thread a new compression fitting over the hose barb, counter-

clockwise, until it is flush or slightly lower than the hose barb.
The compression fitting is reverse threaded.

NOTICE
You must install a new hose barb and compression fitting before
reconnecting the brake lever to the hose.

7 Apply a thin layer of grease to the compression fitting and compression

nut.

DOT grease

Hose Installation 28
8 Install the hose into the lever body while threading the compression
nut into the valve body by hand. Tighten the compression nut.

8 mm 8 N·m (71 in-lb) 10 mm

⚠ CAUTION
Hydraulic hose replacement removes all of the fluid from the system. You must bleed your brakes after you service the brake caliper. Consult the
Road HRD Hose Shortening and Bleed Manual at www.sram.com/service.

Hose Installation 29
 S R A M eTa p A X S H R D S t e a l t h - a - m a j i g H o s e H o o d R e p l a c e m e n t
Perform the Stealth-a-majig hose hood replacement service if the hose at the hood needs to be replaced. For hose shortening instructions, consult
the eTap AXS HRD Hose Shortening and Bleed Manual at www.sram.com/service.

P a r t s , To o l s a n d S u p p l i e s
Parts Common Tools
• Disc Brake Hose Hood Assembly - SRAM RED eTap AXS, and SRAM • Crowfoot wrench: 8 mm
Force eTap AXS HRD Stealth-a-majig
• Flare nut wrench: 8 mm
• Disc Brake Hose Hood Assembly - SRAM Rival eTap AXS HRD
Stealth-a-majig • Hex wrench: 2.5 mm

Safety and Protection Supplies • Hex bit socket: 2.5 mm

• Apron • Open end wrench: 10 mm

• Clean, lint-free shop towels • Torque wrench

• Nitrile gloves • TORX wrenches: T25

• Oil pan • TORX bit socket: T25

• Safety glasses
Lubricants and Fluids
• Isopropyl alcohol
• SRAM DOT assembly grease

Stealth-a-majig Hose Hood Exploded View

Hood

Banjo Bolt
and O-ring

Stealth-a-majig
Hose Banjo

Valve Body

SRAM eTap AXS HRD Stealth-a-majig Hose Hood Replacement 30

 ⚠ WARNING
Do not remove the reservoir bolts on the eTap AXS hood. Bolts that
have been removed and reinstalled will damage the hood assembly
and make the brakes unsafe to use, which could lead to serious injury
and/or death.

Do Not Remove

Hose Removal
If the hood cover has been damaged, remove the hood cover for easier access to the hood. Install a new cover after the service is complete.

1 Loosen and remove the compression nut and hose from the
valve body.

Flare nut wrench: 8 mm Open end wrench: 10 mm

2 Remove the banjo bolt from the outboard side of the hood.

NOTICE
Fluid will drip. Place an oil pan and/or shop towel under the hood.

RED/Force: T25 Rival: 3 mm

Hose Removal 31
3 Remove the Stealth-a-majig hose hood assembly from the inboard side
of the hood.

4 Install a new o-ring on the new Stealth-a-majig hose banjo. Install a new
o-ring on the new banjo bolt.
DOT grease

DOT grease

5 Install the Stealth-a-majig hose banjo into the groove in the inboard
side of the hood. Install the banjo bolt into the outboard side of the
hood and tighten.

NOTICE
Do not overtighten the bolts. Overtightening the bolts can damage
the hood assembly.

RED/Force: T25 Rival: 3 mm RED/Force: 1 N·m ( 9 in-lb) Rival: 2 N·m (18 in-lb)

Hose Removal 32
6 Install the hood cover.

7 Install the hose into the lever body while threading the compression
nut into the valve body by hand. Tighten the compression nut.

8 mm 8 N·m (71 in-lb) 10 mm

⚠ CAUTION
Stealth-a-majig hose hood replacement removes all of the fluid from the system. You must bleed your brakes after you service the lever. Consult the
Road HRD Hose Shortening and Bleed Manual at www.sram.com/service.

Hose Removal 33
 R E D eTa p A X S a n d F o r c e eTa p A X S L e v e r a n d E l e c t r o n i c S u b a s s e m b l y R e p l a c e m e n t
Perform the Brake Lever and Electronic Subassembly replacement if your brake lever, shifter, or battery box has been damaged.

P a r t s , To o l s a n d S u p p l i e s
Parts Common Tools
• SRAM RED eTap AXS Hydraulic Road Brake Lever Assembly - • Hex wrenches: (2) 2.5
Left or Right
• Hex bit sockets: 2.5
• SRAM Force eTap AXS Hydraulic Road Brake Lever Assembly -
Left or Right • Torque wrench

Safety and Protection Supplies • TORX wrench: T6

• Apron • TORX bit socket: T6

• Nitrile gloves • Small flat head wrench

• Safety glasses

R E D eTa p A X S / F o r c e eTa p A X S E x p l o d e d V i e w

Pivot Pin Nut

Bushing
Auxiliary Connector
Cover and Screws

Pivot Pin Bolt

Bushing
Pull Rod

Electronic
Subassembly

Battery Box

Battery Box Screws

Brake and Shift Lever

RED eTap AXS and Force eTap AXS Lever and Electronic Subassembly Replacement 34
 ⚠ WARNING
Do not remove the reservoir bolts on the eTap AXS lever. Removing
the bolts may cause your system to leak, and is not necessary for
service.

Do Not Remove

R E D eTa p A X S a n d F o r c e eTa p A X S L e v e r R e m o v a l
If the hood cover has been damaged, remove the hood cover for easier access to the electronic subassembly. Install a new cover after the service is
complete.

1 Fold the hood cover forward and remove the SRAM eTap AXS Blips or
seal plugs from the electronic subassembly.

2 Remove the screw from the auxiliary connector cover, then fold the
hood cover backward.

T6

RED eTap AXS and Force eTap AXS Lever Removal 35

3 Hold the pivot pin nut in place, then unthread the pivot pin bolt from
the hood assembly.
For best performance, make sure the pivot pin bushings remain on the
pivot pin nut and bolt.

2.5 mm 2.5 mm

4 Rotate the reach adjust bolt clockwise to unthread the lever from the
hood.
The reach adjust bolt is reverse-threaded.

2.5 mm

5 Remove the second auxiliary connector cover screw, then remove the
auxiliary connector cover from the hood assembly.

T6

RED eTap AXS and Force eTap AXS Lever Removal 36

6 Remove the battery box screws. T6

T6

7 Remove the lever and the battery box from the hood assembly, then
remove the auxiliary connectors from the hood assembly.

RED eTap AXS and Force eTap AXS Lever Removal 37

R E D eTa p A X S a n d F o r c e eTa p A X S L e v e r I n s t a l l a t i o n

1 Install the auxiliary connectors into the hood so the auxiliary connector
with the longer wire is in the top slot. Install the battery box into the
hood, making sure the wires are routed beneath the battery box
without being pinched.

NOTICE
Do not pinch the electronic subassembly wires when installing the
battery block into the hood assembly. Pinching the wires can lead to
shifter malfunction or damage to the wires.

2 Install the longer screw into the auxiliary connector cover and gently
tighten.
T6

NOTICE
Do not overtighten the screws. Overtightening the screws can
damage the hood assembly.

3 Install the shorter screws into the battery box and gently tighten. T6

NOTICE
Do not overtighten the screws. Overtightening the screws can
damage the hood assembly.

T6

RED eTap AXS and Force eTap AXS Lever Installation 38

4 Insert the lever into the hood assembly. Insert a 2.5 mm hex wrench
into the reach adjust bolt hole in the lever and align the wrench with
2.5 mm

the pull rod. Push the lever into the hood assembly, and rotate the bolt
counter-clockwise to tighten the bolt to hand tight.
The reach adjust pull rod is reverse-threaded.

2.5 mm

5 Install the pivot pin nut and the pivot pin bolt into the hood. Hold the
nut in place, then tighten the pivot pin bolt.

2.5 mm 1.2 N·m (11 in-lbs) 2.5 mm

6 Adjust the reach to your desired setting.

Rotate the reach adjust screw clockwise to move the lever toward
the handlebar, or counter-clockwise to move the lever away from the
handlebar.

2.5 mm

RED eTap AXS and Force eTap AXS Lever Installation 39

 7 Fold the hood cover forward. Install the second cover screw into the
auxiliary connector cover and gently tighten. Install SRAM eTap AXS
Blips into the auxiliary ports, or leave the seal plugs in place. Fold the
hood cover down.

NOTICE
Do not overtighten the screws. Overtightening the screws can
damage the hood assembly.
Do not use SRAM AXS shifters without Blip or Clic wires or seal
plugs installed. Moisture will damage the electronic components.

T6

Your eTap AXS system must be paired before riding. Consult the eTap AXS Systems User Manual for pairing information at www.sram.com/service.

RED eTap AXS and Force eTap AXS Lever Installation 40

 R i v a l eTa p A X S L e v e r a n d E l e c t r o n i c S u b a s s e m b l y R e p l a c e m e n t
Perform the Lever replacement if your brake lever, shifter, or battery box has been damaged.

P a r t s , To o l s a n d S u p p l i e s
Parts Common Tools
• SRAM Rival eTap AXS Hydraulic Road Brake Lever Assembly - • Hex wrenches: 2.5, and (2) 3 mm
Left or Right
• Hex bit socket: 3 mm
Safety and Protection Supplies
• Mallet
• Apron
• Small flat blade screwdriver
• Nitrile gloves
• Torque wrench
• Safety glasses

R i v a l eTa p A X S E x p l o d e d V i e w

Hood

Pivot Pin Bolt

Knurled Pivot Pin

Reach Adjust
Pull Rod

Lever

Cross Dowel

Battery Box

Brake and Shift

Lever

Rival eTap AXS Lever and Electronic Subassembly Replacement 41

 ⚠ WARNING
Do not remove the reservoir bolts on the eTap AXS lever. Removing
the bolts may cause your system to leak, and is not necessary for
service.

Do Not Remove

R i v a l eTa p A X S L e v e r R e m o v a l

1 Remove the hood cover.

Rival eTap AXS Lever Removal 42

2 Hold the knurled pivot pin in place on the inboard side of the lever,
then unthread the pivot pin bolt from the outboard side of the lever.
Thread the pivot pin back in 3 or 4 turns.
Tilt the lever against a flat surface and use a mallet to tap the pivot pin
and dislodge the knurled pivot pin from the inboard side of the lever.
Remove the pivot pin and knurled pivot pin from the lever.

3 mm 3 mm

3 Rotate the reach adjust pull rod clockwise to unthread the lever from
the hood.
The reach adjust pull rod bolt is reverse-threaded.

2.5 mm

Rival eTap AXS Lever Removal 43

4 Insert a small flat blade screwdriver into one of the four grooves
around the battery box. Push inward and upward to begin releasing the
battery box. Repeat this step in each groove, in a circular pattern, until
the battery box releases. Remove the battery box and lever assembly.

Small flat blade screwdriver

Rival eTap AXS Lever Removal 44

R i v a l eTa p A X S L e v e r I n s t a l l a t i o n

1 Install the battery box into the hood, making sure the wire is routed
through the groove in the hood.

NOTICE
Do not pinch the wire when installing the battery box into the hood.
Pinching the wire can lead to shifter malfunction or damage to the
wire.

2 Install the cross dowel into the cross dowel bushing in the lever. Hold
in place while the lever is installed.

3 Insert a 2.5 mm hex wrench through the hole in the cross dowel and
into the reach adjust pull rod. Rotate the bolt counter-clockwise to
2.5 mm

tighten the bolt to hand tight.

The reach adjust pull rod is reverse-threaded.

2.5 mm

Rival eTap AXS Lever Installation 45

 4 Install the knurled pivot pin into the inboard side of the hood. Hold the
knurled pivot pin in place, then install and tighten the pivot pin bolt on
the outboard side of the hood.

3 mm 1.2 N·m (11 in-lbs) 3 mm

5 Install the hood cover. Adjust the reach of the lever to your desired
setting.
2.5 mm

Rotate the reach adjust screw clockwise to move the lever toward
the handlebar, or counter-clockwise to move the lever away from the
handlebar.

Your eTap AXS system must be paired before riding. Consult the eTap AXS Systems User Manual for pairing information at www.sram.com/service.

Rival eTap AXS Lever Installation 46

These are registered trademarks of SRAM, LLC:

1:1®, Accuwatt®, Avid®, ATAC®, AXS®, Bar®, Bioposition®, Blackbox®, BoXXer®, DoubleTap®, eTap®, Firecrest®, Firex®, Grip Shift®, GXP®, Holzfeller®,
Hussefelt®, Iclic®, i‑Motion®, Judy®, Know Your Powers®, NSW®, Omnium®, Osmos®, Pike®, PowerCal®, PowerLock®, PowerTap®, Qollector®, Quarq®,
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X‑SYNC®, XX1®, Zipp®

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BlipClamp™, BlipGrip™, Blips™, Bluto™, Bottomless Tokens™, ButterCup™, Cage Lock™, Carbon Bridge™, Centera™, Charger™, Charger 2™, Charger 3™,
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DD3 Pulse™, DebonAir™, Deluxe™, Descendant™, DFour™, DFour91™, DH™, Dig Valve™, DirectLink™, Direct Route™, Domain™, DOT 5.1™, Double Decker™,
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MatchMaker™, Maxle™, Maxle 360™, Maxle DH™, Maxle Lite™, Maxle Lite DH™, Maxle Stealth™, Maxle Ultimate™, Micro Gear System™, Mini Block™,
Mini Cluster™, Monarch™, Monarch Plus™, Motion Control™, Motion Control DNA™, MRX™, MX™, Noir™, NX™, OCT™, OmniCal™, OneLoc™, Paceline™, Paragon™,
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Powered by SRAM™, PowerGlide™, PowerLink™, Power Pack™, Power Spline™, Predictive Steering™, Pressfit™, Pressfit 30™, Prime™, Qalvin™, R2C™,
Rapid Recovery™, Recon™, Reverb™, Revelation™, Riken™, Roller Bearing Clutch™, Rolling Thunder™, RS‑1™, Rudy™, Rush™, RXS™, Sag Gradients™, Sawtooth™,
SCT ‑ Smart Coasterbrake Technology™, Seeker™, Sektor™, SHIFT™, ShiftGuide™, Shorty™, Showstopper™, SIDLuxe™, Side Swap™, Signal Gear Technology™,
SL™, SL‑70™, SL‑70 Aero™, SL‑70 Ergo™, SL‑80™, Sl‑88™, SLC2™, SL SPEED™, SL Sprint™, Smart Connect™, Solo Air™, Solo Spoke™, Speciale™, SpeedBall™,
Speed Metal™, SRAM APEX 1™, SRAM Force 1™, SRAM RIVAL 1™, S‑series™, Stealth‑a‑majig™, StealthRing™, Super‑9™, Supercork™, Super Deluxe™,
Super Deluxe Coil™, SwingLink™, SX™, Tangente™, TaperCore™, Timing Port Closure™, TSE Technology™, Tool‑free Reach Adjust™, Top Loading Pads™,
Torque Caps™, TRX™, Turnkey™, TwistLoc™, VCLC™, Vivid™, Vivid Air™, Vuka Aero™, Vuka Alumina™, Vuka Bull™, Vuka Clip™, Vuka Fit™, Wide Angle™,
WiFLi™, X1™, X3™, X4™, X5™, X7™, X9™, X‑Actuation™, XC™, X‑Dome™, XD™, XDR™, XG‑1150™, XG‑1175™, XG‑1180™, XG‑1190™, X‑Glide™, X‑GlideR™, X‑Horizon™,
XLoc Sprint™, XPLR™, XPRESSO™, XPRO™, X‑Range™, XX™, Yari™, ZEB™, Zero Loss™, ZM2™, ZR1™

Specifications and colors subject to change without prior notice.

© 2022 SRAM, LLC

This publication includes trademarks and registered trademarks of the following companies:

TORX® is a registered trademark of Acument Intellectual Properties, LLC.

47
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