TABLE A-2 Radial R-4 Drive Wheel Tires Used on Industrial Tractors TIRE TYPE NOMENCLATURE Code No. Tire Type R-4 Industrial Tractor, Drive Wheel, Intermediate Tread   TIRES USED AS SINGLES WITHOUT SUSTAINED HIGH TORQUE MAXIMUM SPEED - 25 MPH (40KM/H) - SPEED SYMBOL A8 TIRE SIZE DESIGNATION TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES psi kPa 20 140 23 160 26 180 29 200 32 220 35 240 38 260 41 280 44 300 46 320 320/80R18 lbs. 0 2600 2830 3080 3300 3520 (124) 3740 3960 4180 4680 (134)   kg 0 1180 1285 1400 1500 1600 (124) 1700 1800 1900 2120 (134) 340/80R18 lbs. 0 2830 3080 3300 3640 3860 (127) 4180 4400 4680 4940 (136)   kg 0 1285 1400 1500 1650 1750 (127) 1900 2000 2120 2240 (136) 17.5LR24 lbs. 4080 4540 5080 5520 5840 6150 6600 (146) 6950 7400 (150)     kg 1850 2060 2300 2500 2650 2800 3000 (146) 3150 3350 (150)   19.5LR24 lbs. 4940 5520 6000 6600 6950 7400 7850 (152) 8250 8800 (156)     kg 2240 2500 2725 3000 3150 3350 3550 (152) 3750 4000 (156)   500/70R24 lbs. 0 5200 5680 6150 0 0 7600 8050 8550 9100 (157)   kg 0 2360 2575 2800 0 0 3450 3650 3875 4125 (157) NOTES: 1: Bold face denotes maximum load for the (Load Index) in parenthesis. 2: For field or other usage, refer to Table A. 3 The following load limits at various speeds apply with no change in inflation pressure: *Cyclic applications include the normal usages of loaders, log stackers, etc. The minimum load must not exceed 60% of the maximum rated tire load. - Maximum one-way haul distance 500 feet (150 meters). - Vehicle is operating over unimproved but generally level terrain. - Consult the rim/wheel manufacturer for confirmation of the strength of the rim/wheel for the intended service. MAX. SPEED % CHANGE IN ABOVE MPH KM/H REGULAR APPLICATION CYCLIC* APPLICATION Stationary Stationary +130% +130% 2.5 5 +45% +67% 5 10 +25% +50% 10 15 +13% +34% 15 25 +9% - 20 30 +4% - 25 40 same as above table - 30 50 -9% - FOR RIM AND WHEEL LOAD INFORMATION, SEE IMPORTANT NOTES IN CHARTS I AND II IN GENERAL FARM TIRE INFORMATION