Firestone Agricultural Tire Division

TABLE E
Diagonal (Bias) Ply Agricultural Tractor Drive Wheel Tires
TIRES USED AS SINGLES

TIRE TYPE NOMENCLATURE
Code No.	Tire Type
R-1 R-2 R-3 R-4	Drive Wheel, Regular Tread Cane & Rice, Drive Wheel, Deep Tread Drive Wheel, Shallow Tread Industrial Tractor, Drive Wheel, Intermediate Tread

FOR A8 SPEED SYMBOL TIRES

Basic Tire Load Ratings for Tire Selection — MAXIMUM SPEED — 25 MPH (40 KM/H)

TIRE SIZE	TIRE LOAD LIMITS AT VARIOUS COLD INFLATION PRESSURES
TIRE SIZE	psi kPa	12 80	14 100	16 110	18 120	20 140	22 150	24 170	26 180	28 190	30 210	32 220
7.50-22	lbs.	990	1100	1170	1280	1360(4)
	kg	450	500	530	580	615(4)
8.3-16	lbs.	640	715	760	825	880	935(4)	965	1020	1070	1100	1140	1200 @ 34(6)
	kg	290	325	345	375	400	425(4)	437	462	487	500	515	545 @ 230(6)
8.3-22	lbs.	785	910	965	990	1100	1170(4)	1230	1280	1320	1390	1430	1760 @ 36(6)
	kg	355	412	437	450	500	530(4)	560	580	600	630	650	800 @ 250(6)
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	lbs.	1430	1570	1650	1820	1930(4)	2040	2150	2270	2340	2400(6)	2540	2910 @ 40(8)
													3200 @ 48(10)
	kg	650	710	750	825	875(4)	925	975	1030	1060	1090(6)	1150	1320 @ 280(8)
													1450 @ 330(10)
11.2-24	lbs.	1320	1430	1570	1650(4)	1760	1870	1980	2090(6)	2150	2270	2340	2540 @ 36(8)
	kg	600	650	710	750(4)	800	850	900	950(6)	975	1030	1060	1150 @ 250(8)
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)
	kg	750	800	875	950(4)
12.4-16	lbs.	1200	1320	1430(4)	1520	1650	1710	1820(6)	1930	1980	2090	2150(8)	2760 @ 48(12)
	kg	545	600	650(4)	690	750	775	825(6)	875	900	950	975(8)	1250 @ 330(12)
12.4-24	lbs.	1570	1710	1870(4)	1980	2150	2270	2400(6)	2470	2600	2680	2830(8)	3520 @ 48(12)
	kg	710	775	850(4)	900	975	1030	1090(6)	1120	1180	1215	1285(8)	1600 @ 330(12)
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)
	kg	875	950	1030(4)	1090	1150	1215	1285(6)	1360	1400	1450	1550(8)	1750 @ 280(10)
12.4-38	lbs.	1980	2150	2340(4)	2470	2600	2760	2910(6)				3520(8)	4400 @ 48(12)
	kg	900	975	1060(4)	1120	1180	1250	1320(6)				1600(8)	4800 @ 56(14)
12.4-42	lbs.	2040	2270	2470(4)	2600	2760	2910	3080(6)	3200	3420	3520	3640(8)	4180 @ 40(10)
	kg	925	1030	1120(4)	1180	1250	1320	1400(6)	1450	1550	1600	1650(8)	1900 @ 280(10)
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)
	kg	*900	1000(4)	1060	1150	1215	1285(6)	1360	1400	1500(8)	1550	1600	1700 @ 250(10)
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)
	kg	*1000	1090(4)	1180	1285	1360(6)	1450	1500	1600(8)	1650	1700	1800	2000 @ 260(12)
420/70-24	lbs.	2340	2540	2760(6)	2910	3080	3300(8)	3520	3640(10)
	kg	1060	1150	1250(6)	1320	1400	1500(8)	1600	1650(10)
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)
	kg	*1250	1360	1500	1600	1700(6)	1800	1900	1950 (8)	2060	2120	2240 (10)	5840 @ 44 (14)
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)	1950	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)
16.9-30	lbs.	*3000	*3300	3520	3740(6)	3960	4180	4400(8)	4680	4940(10)
	kg	*1360	*1500	1600	1700(6)	1800	1900	2000(8)	2120	2240(10)
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)
18.4-24	lbs.	*3200	*3520	3860(6)	4080	4400(8)	4540	4800	5080(10)	5360	5520	5680(12)
	kg	*1450	*1600	1750(6)	1850	2000(8)	2060	2180	2300(10)	2430	2500	2575(12)
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(14)
	kg	*1800	*2000	2120(6)	2300	2430(8)	2575	2725	2900(10)	3000	3075	3250(12)	3450(14)
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)
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)
	kg	*2300	*2500	2725(8)	2900	3075(10)
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)

17.5L-24	lbs.	2600	2830	3080(6)	3300	3520	3640(8)	3860	4080	4180(10)
	kg	1180	1285	1400(6)	1500	1600	1650(8)	1750	1850	1900(10)
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)
21L-24	lbs.	3640	3960	4300	4540	4800	5080(10)	5360	5680	5840(12)	6150		6800 @ 36(16)
	kg	1650	1800	1950	2060	2180	2300(10)	2430	2575	2650(12)	2800		3075 @ 250(16)
21L-28	lbs.	3860	4180(6)	4540	4800(8)	5200	5560(10)	5840	6000	6150(12)	6600	6800(14)
	kg	1750	1900(6)	2060	2180(8)	2360	2500(10)	2650	2725	2800(12)	3000	3075(14)
21.5L-16.1	lbs.	2760(6)	3000	3200	3420(8)	3640	3860(10)
	kg	1250(6)	1360	1450	1550(8)	1650	1750(10)
24L-26	lbs.	4300(6)	4800	5080(8)	5520	5840(10)	6150	6600(12)
	kg	1950(6)	2180	2300(8)	2500	2650(10)	2800	3000(12)
28L-26	bs.	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)

NOTES	1:	Figures in parentheses denote ply rating for which bold face 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 by .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) in the adjoining table do not apply when operating on slopes greater than 11° (20% grade).
	8:	For cyclic loading field service, see Table F-2. For tire sizes not shown, see Note 4 on Table F-2.
	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
10 mph (15 km/h)	+33% (except hillside combines)
15 mph (25 km/h)	+22% (except hillside combines)
20 mph (30 km/h)	+11% (except hillside combines)
25 mph (40 km/h)	Same as above table

FOR RIM AND WHEEL LOAD INFORMATION, SEE IMPORTANT NOTES IN CHARTS I AND II IN GENERAL FARM TIRE INFORMATION