LOAD &
INFLATION TABLE E
TIRE TYPE NOMENCLATURE
DIAGONAL (BIAS) PLY AGRICULTURAL TRACTOR MAX. SPEED
DRIVE WHEEL TIRES SPEED INDEX
TIRES USED AS SINGLES TRA TIRE TYPE A8
R-1 Drive Wheel, Regular Tread 25 MPH
BASIC TIRE LOAD RATINGS FOR TIRE SELECTION R-2 Cane & Rice, Drive Wheel, Deep Tread 25 MPH
R-3 Drive Wheel, Shallow Tread 25 MPH
R-4 Industrial Tractor, Drive Wheel, Intermediate Tread 25 MPH
INFLATION TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
TIRE
psi 12 14 16 18 20 22 24 26 28 30 32
SIZE
kPa 80 100 110 120 140 150 170 180 190 210 220
8.3-22 lbs 785 910 965 990 1100 1170(4) 1230 1280 1320 1390 1430 1760 @ 36(6) psi
kg 355 412 437 450 500 530(4) 560 580 600 630 650 800 @ 250 (6) kPa
8.3-24 lbs 880 965 1020 1100 1170 1230(4)
kg 400 437 462 500 530 560(4)
9.5-16 lbs 825 910 965 1050 1100(4) 1170 1230 1280 1360 1390(6)
kg 375 412 437 475 500(4) 530 560 580 615 630(6)
9.5-22 lbs 990 1140 1200 1230 1360(4) 1430 1520 1570 1650 1710 1760(6)
kg 450 515 545 560 615(4) 650 690 710 750 775 800(6)
9.5-24 lbs 1100 1200 1280 1390 1480(4) 1570 1650 1710 1820 1870(6)
kg 500 545 580 630 670(4) 710 750 775 825 850(6)
9.5-32 lbs 1230 1360 1480 1570 1650(4) 1760 1870 1930 2040 2090(6)
kg 560 615 670 710 750(4) 800 850 875 925 950(6)
9.5-36 lbs 1320 1430 1570 1650 1760(4)
kg 600 650 710 750 800(4)
9.5-42 1430 1570 1650 1820 1930(4) 2040 2150 2270 2340 2400 (6) 2540 2910 @ 40(8) psi
lbs
3200 @ 48(10) psi
650 710 750 825 875(4) 925 975 1030 1060 1090 (6) 1150 1320 @ 280(8) kPa
kg
1450 @ 330(10) kPa
11.2-24 lbs 1320 1430 1570 1650(4) 1760 1870 1980 2090(6) 2150 2270 2340 2540 @ 36(8) psi 2830 @ 44(10) psi
kg 600 650 710 750(4) 800 850 900 950(6) 975 1030 1060 1150 @ 250(8) kPa 1285 @ 300(10) kPa
11.2-28 lbs 1390 1520 1650 1760(4) 1930 1980 2090 2200 (6)
kg 630 690 750 800(4) 875 900 950 1000(6)
11.2-36 lbs 1570 1760 1870 2040(4)
kg 710 800 850 925(4)
11.2-38 lbs 1650 1760 1930 2090(4) 2200 2340 2470 2540(6)
kg 750 800 875 950(4) 1000 1060 1120 1150(6)
12.4-16 lbs 1200 1320 1430(4) 1520 1650 1710 1820(6) 1930 1980 2090 2150(8) 2760 @ 48(12) psi
kg 545 600 650(4) 690 750 775 825(6) 875 900 950 975(8) 1250 @ 330(12) kPa
12.4-24 lbs 1570 1710 1870(4) 1980 2150 2270 2400(6) 2470 2600 2680 2830(8) 3520 @ 48(12) psi
kg 710 775 850(4) 900 975 1030 1090(6) 1120 1180 1215 1285(8) 1600 @ 330(12) kPa
FirestoneAg.com
LOAD &
DIAGONAL (BIAS) PLY AGRICULTURAL TRACTOR DRIVE WHEEL TIRES
TIRES USED AS SINGLES
INFLATION BASIC TIRE LOAD RATINGS FOR TIRE SELECTION TABLE E
INFLATION TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
TIRE
psi 12 14 16 18 20 22 24 26 28 30 32
SIZE
kPa 80 100 110 120 140 150 170 180 190 210 220
12.4-28 lbs 1710 1870 1980(4) 2150 2270 2400 2540(6)
kg 775 850 900(4) 975 1030 1090 1150(6)
12.4-36 lbs 1930 2090 2270(4) 2400 2540 2680 2830(6) 3000 3080 3200 3420(8) 3860 @ 40(10) psi
kg 875 950 1030(4) 1090 1150 1215 1285(6) 1360 1400 1450 1550(8) 1750 @ 280(10) kPa
12.4-38 lbs 1980 2150 2340(4) 2470 2600 2760 2910(6) 3520(8) 4400 @ 48(12) psi 4800 @ 56(14) psi
kg 900 975 1060(4) 1120 1180 1250 1320(6) 1600(8) 2000 @ 330(12) kPa 2180 @ 385(14) kPa
12.4-42 lbs 2040 2270 2470(4) 2600 2760 2910 3080(6) 3200 3420 3520 3640(8) 4180 @ 40(10) psi
kg 925 1030 1120(4) 1180 1250 1320 1400(6) 1450 1550 1600 1650(8) 1900 @ 280(10) kPa
13.6-16 lbs 1430 1570(4)
kg 650 710(4)
13.6-24 lbs *1870 2040(4) 2200 2340 2540 2680(6) 2830 2910 3080(8)
kg *850 925(4) 1000 1060 1150 1215(6) 1285 1320 1400(8)
13.6-26 lbs 1930 2090(4) 2270 2470 2600 2760(6) 2910 3000 3200(8)
kg 875 950(4) 1030 1120 1180 1250(6) 1320 1360 1450(8)
13.6-28 lbs *1980 2200(4) 2340 2540 2680 2830(6) 3000 3080 3300(8) 3420 3520 3740 @ 36 (10) psi 4180 @ 42 (12 ) psi
kg *900 1000(4) 1060 1150 1215 1285(6) 1360 1400 1500(8) 1550 1600 1700 @ 250 (10) kPa 1900 @ 290 (12) kPa
13.6-36 lbs *2270 2470(4) 2680 2830 3000 3200(6)
kg *1030 1120(4) 1215 1285 1360 1450(6)
13.6-38 lbs 2340 2540(4) 2760 2910 3080 3300(6)
kg 1060 1150(4) 1250 1320 1400 1500(6)
13.6-46 lbs 2540 2830(4) 3000 3200 3420 3640(6) 3860 4080 4180(8)
kg 1150 1285(4) 1360 1450 1550 1650(6) 1750 1850 1900(8)
14.9-24 lbs *2200 2400(4) 2600 2830 3000(6) 3200 3300 3520(8) 3640 3740 3960 4400 @ 38(12) psi
kg *1000 1090(4) 1180 1285 1360(6) 1450 1500 1600(8) 1650 1700 1800 2000 @ 260(12) kPa
14.9-26 lbs *2270 2540 2680 2910 3080(6) 3300 3420 3640 3740 3960 4080(10)
kg *1030 1150 1215 1320 1400(6) 1500 1550 1650 1700 1800 1850(10)
14.9-28 lbs *2340 2600(4) 2830 3000 3200(6) 3420 3520 3740(8) 3860 4080 4180(10)
kg *1060 1180(4) 1285 1360 1450(6) 1550 1600 1700(8) 1750 1850 1900(10)
14.9-30 lbs *2470 2680 2910 3080 3300(6) 3520 3640 3860(8) 3960 4180 4300(10)
kg *1120 1215 1320 1400 1500(6) 1600 1650 1750(8) 1800 1900 1950(10)
14.9-38 lbs *2760 3000 3300 3520 3740(6) 3960 4180 4300(8) 4540 4680 4940(10) 5360 @ 38(12) psi
kg *1250 1360 1500 1600 1700(6) 1800 1900 1950(8) 2060 2120 2240(10) 5840 @ 44(14) psi
15.5-38 lbs *2600 2830 3080 3300 3520(6) 3740 3860 4080(8)
kg *1180 1285 1400 1500 1600(6) 1700 1750 1850(8)
16.9-24 lbs *2680 *2910 3200 3420(6) 3640 3860 4080(8) 4300 4400(10)
kg *1215 *1320 1450 1550(6) 1650 1750 1850(8) 1900 2000(10)
16.9-26 lbs *2760 *3080 3300 3520(6) 3740 3960 4180 4400 4540(10)
kg *1250 *1400 1500 1600(6) 1700 1800 1900 2000 2060(10)
16.9-28 lbs *2910 *3200 3420 3640(6) 3860 4080 4300(8) 4540 4680(10)
kg *1320 *1450 1550 1650(6) 1750 1850 1950(8) 2060 2120(10)
FirestoneAg.com
LOAD &
DIAGONAL (BIAS) PLY AGRICULTURAL TRACTOR DRIVE WHEEL TIRES
TIRES USED AS SINGLES
INFLATION BASIC TIRE LOAD RATINGS FOR TIRE SELECTION TABLE E
INFLATION TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
TIRE
psi 12 14 16 18 20 22 24 26 28 30 32
SIZE
kPa 80 100 110 120 140 150 170 180 190 210 220
16.9-30 lbs *3000 *3300 3520 3740(6) 3960 4180 4400(8) 4680 4940(10) 5520 @ 34 (12) psi
kg *1360 *1500 1600 1700(6) 1800 1900 2000(8) 2120 2240(10) 2500 @ 230 (12) kPa
16.9-34 lbs *3200 *3420 3740 3960(6) 4300 4540 4680(8) 4940 5200(10)
kg *1450 *1550 1700 1800(6) 1950 2060 2120(8) 2240 2360(10)
16.9-38 lbs *3300 *3640 3960 4180(6) 4540 4800 4940(8)
kg *1500 *1650 1800 1900(6) 2060 2180 2240(8)
18.4-16.1 lbs *2150 *2340 2540(6) 2680 2910(8) 3080 3200 3300(10)
kg *975 *1060 1150(6) 1215 1320(8) 1400 1450 1500(10)
18.4-26 lbs *3300 *3640 3960(6) 4180 4540(8) 4800 4940 5200(10) 5520 5680 5840(12)
kg *1500 *1650 1800(6) 1900 2060(8) 2180 2240 2360(10) 2500 2575 2650(12)
18.4-28 lbs *3420 *3740 4080(6) 4400 4680(8) 4940 5200 5360(10) 5680 5840 6150(12)
kg *1550 *1700 1850(6) 2000 2120(8) 2240 2360 2430(10) 2575 2650 2800(12)
18.4-30 lbs *3520 *3860 4180(6) 4540 4800(8) 5080 5360 5520(10) 5840 6150 6400(12)
kg *1600 *1750 1900(6) 2060 2180(8) 2300 2430 2500(10) 2650 2800 2900(12)
18.4-34 lbs *3740 *4180 4400(6) 4800 5080(8) 5360 5680 6000 6150 6400 6600(12)
kg *1700 *1900 2000(6) 2180 2300(8) 2430 2575 2725 2800 2900 3000(12)
18.4-38 lbs *3960 *4400 4680(6) 5080 5360(8) 5680 6000 6400(10) 6600 6800 7150(12) 7600 @ 36(14) psi
kg *1800 *2000 2120(6) 2300 2430(8) 2575 2725 2900(10) 3000 3075 3250(12) 3450 @ 250(14) kPa
18.4-42 lbs *4180 *4680 4940 5360 5680(8) 6000 6400 6600(10) 6950 7150 7400(12)
kg *1900 *2120 2240 2430 2575(8) 2725 2900 3000(10) 3150 3250 3350(12)
18.4-46 lbs *4400 *4800 5200 5680 6000 6400 6600 6950 7400 7600 7850 8550 @ 36 (14) psi
kg *2000 *2180 2360 2575 2725 2900 3000 3150 3350 3450 3550 3450 @ 250 (14) kPa
20.8-34 lbs *4540 *4940 5360 5840(8) 6150 6600(10)
kg *2060 *2240 2430 2650(8) 2800 3000(10)
20.8-38 lbs *4800 *5360 5680 6150(8) 6600 6950(10) 7150 7600 7850(12) 8250 8550(14)
kg *2180 *2430 2575 2800(8) 3000 3150(10) 3250 3450 3550(12) 3750 3875(14)
20.8-42 lbs *5080 *5520 6000 6400 6950 7400(10) 7600 8050 8550(12) 8800 9100(14)
kg *2300 *2500 2725 2900 3150 3350(10) 3450 3650 3875(12) 4000 4125(14)
23.1-26 lbs *4800 *5200 5680(8) 6000 6400(10) 6800 7150(12) 7600 7850(14)
kg *2180 *2360 2575(8) 2725 2900(10) 3075 3250(12) 3450 3550(14)
23.1-30 lbs *5080 *5520 6000(8) 6400 6800(10) 7600 (12)
kg *2300 *2500 2725(8) 2900 3075(10) 3450 (12)
23.1-34 lbs *5360 *5840 6400(8) 6800 7400(10)
kg *2430 *2650 2900(8) 3075 3350(10)
24.5-32 lbs *5840 *6400 6800 7400 7850(10) 8250 8800(12) 9100 9650(14) 10400(16)
kg *2650 *2900 3075 3350 3550(10) 3750 4000(12) 4125 4375(14) 4725 (16)
FirestoneAg.com
LOAD &
DIAGONAL (BIAS) PLY AGRICULTURAL TRACTOR DRIVE WHEEL TIRES
TIRES USED AS SINGLES
INFLATION BASIC TIRE LOAD RATINGS FOR TIRE SELECTION TABLE E
LOW SECTION HEIGHT
INFLATION TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
TIRE
psi 12 14 16 18 20 22 24 26 28 30 32
SIZE
kPa 80 100 110 120 140 150 170 180 190 210 220
19.5L-24 lbs 3080 3420 3640 3860 4180(8) 4400 4680(10) 4800 5080 5200(12)
kg 1400 1550 1650 1750 1900(8) 2000 2120(10) 2180 2300 2360(12)
21.5L-16.1 lbs 2760(6) 3000 3200 3420(8) 3640 3860(10)
kg 1250(6) 1360 1450 1550(8) 1650 1750(10)
28L-26 lbs 5520 6000 6600 6950(10) 7400(12) 7850 8250(14) 8800 9100(16)
kg 2500 2725 3000 3150(10) 3350(12) 3560 3740(14) 4000 4125(16)
30.5L-32 lbs 6950(8) 7600 8250(10) 8800 9350(12) 9900(14) 10500 11000(16)
kg 3150(8) 3450 3750(10) 4000 4250(12) 4500(14) 4750 5000(16)
35.5L-32 lbs 9350 10200(10) 11000(12) 11700(14) 12800 13200(16) 13900(18) 14800 15200(20) 16100(22) 16500(24)
kg 4250 4625(10) 5000(12) 5300(14) 5800 6000(16) 6300(18) 6700 6900(20) 7300(22) 7500(24)
METRIC
INFLATION TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
TIRE SIZE psi 23 26 29 32 35 38 41 44 46 49 52 58 61 64
kPa 160 180 200 220 240 260 280 300 320 340 360 400 420 440
520/85D38 LI 155 158 160 164 167 169 170 173
lbs 8550 9100 9350 9650 9900 10500 11000 11400 12000 12300 12800 13200 13900 14300
kg 3875 4125 4250 4375 4500 4750 5000 5150 5450 5600 5800 6000 6300 6500
* Values at these inflation pressures are for determination of dual loads only.
NOTES:
1. Figures in parentheses denote ply rating for which boldface loads and inflations are maximum.
2. For shipping purposes, tire inflation pressures may be increased to 30 psi (210 kPa). Consult tire manufacturer for minimum tire shipping pressure. Inflation pressure
must be reduced to operating inflation before the machine is removed from the carrier.
3. When used as duals, tire loads must be reduced 12%. (Multiply figures in above table at .88.)
4. When used as triples, tire loads must be reduced 18%. Multiply figures in above table by .82.)
5. For R-3 tires used in free rolling service at speeds up to 10 mph (15 km/h) maximum, above loads may be increased 50% with a 4 psi (30 kPa) increase in inflation pressure.
6. For R-4 tires in transport service see Table G.
7. The above loads are also applicable to equipment, including hillside combines, operating on slopes above 11° (20% grade). Load adjustments below 20 mph (30 km/h)
do not apply.
8. For cyclic loading field service, see Table F2 on page 146. For tire sizes not shown, see Note 4 on page 148.
9. For R-1, R-2 and R-3 tires in transport service and operations which do not require sustained high torque, the following load limits at various speeds apply:
MAX. SPEED % CHANGE IN ABOVE LOADS CHANGE IN INFL. PRESSURE
Stationary +200% 30%
10 mph (15 km/h) +34% (except hillside combines) None
15 mph (25 km/h) +22% (except hillside combines) None
20 mph (30 km/h) +11% None
25 mph (40 km/h) Same As Table None
FOR RIM AND WHEEL LOAD INFORMATION, SEE IMPORTANT NOTES ON PAGES 174-178.
FirestoneAg.com
