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SECTION 5 - SPECIFICATIONS
5-25
TIRE LOAD AND INFLATION TABLES
Use the following chart and guidelines to determine the proper inflation pressure for tires on a given
axle. Dividethe axle weight bythe number of tires on an axle to determinethe load to be carried byeach
tire. The values shown in the shaded areas are for bias ply tires.
U.S. Measure
Inflation
Pressure (PSI)
8 9 10 12 14 16 18 20 22 24
18.4 R38
Singles - lbs. 3500 3760 3980 4440 4860 5260 5680 5980 6330 6660
Duals - lbs. 3080 3310 3500 3910 4280 4630 5000 5260 5570 5860
18.4 R42
Singles - lbs. 3700 3960 4200 4680 5120 5540 6000 6310 6670 7020
Duals - lbs. 3700 3960 4200 4680 5120 5540 6000 6310 6670 7020
18.4 R46
Singles - lbs. 3880 4160 4420 4920 4920 5820 6150
Duals - lbs. 3410 3660 3890 4330 4330 5120 5410
Triples - lbs. 3170 3430 3610 4050 4400 4790 5040
20.8 R38
Singles - lbs. 4240 4540 4840 5380 5880 6350 6800 7250 7670 8070
Duals - lbs. 3730 4000 4260 4730 5170 5590 5980 6380 6750
20.8 R42
Singles - lbs. 4480 4800 5100 5680 6200 6700 7150 7650 8090
Duals - lbs. 3940 4220 4490 5000 5460 5900 6290 6730 7120
Triples - lbs. 3670 3940 4180 4660 5080 5490 5860 6730 7120
24.5 R32
Singles - lbs. 5100 5460 5800 6450 7050 7650 8250 8700 9200 9680
Duals - lbs. 4490 4800 5100 5680 6200 6730 7260 7660 8100 8520
30.5 R32
Singles - lbs.
6150 6600 6950 7600 8550 9100 9650
Duals - lbs.
5410 5810 6120 6690 7520 8010 8490
480/80 R46
Singles - lbs. 4050
4300 4550 5080 5450 6000 7150 7150 7650 8000
Duals - lbs.
3600 3780 4000 4470 4800 5850 6300 6290 6700 7050
Triples - lbs.
3350 3530 3700 4170 4500 5450 5850 5860 6550 6550
520/85 R42
Singles - lbs.
4650 5200 5675 6275 7000 7700 8250 8825
Duals - lbs.
4100 4575 5000 5525 6150 6775 7250 7750
Triples - lbs.
3825 4250 4650 5150 5750 6325 6775 7225
650/65 R38
Singles - lbs.
4780 5340 5840 6450 7200 7840 8250 8800
Duals - lbs.
4215 4700 5150 5675 6350 6900 7250 7750
700/65 R38*
Singles - lbs. 5600 5900 6450 6980 7950 8400
Duals - lbs. 4930 5190 5675 6140 6995 7390