Chevrolet 10 Series 1968, Service Manual

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WHEELS AND TIRES 10-5
TIRES FOR TRUCKS AND BUSSES USED IN HIGHWAY SERVICE
TIRES USED AS SINGLES
Tire
Size
Ply
Rating
Tire Load Limits at Various Inflation Pressures
50 55 60 65 70 75 80 85 90 95 100
6.50-20 6 1870 2010
2130
* 6.50-20 8 1870 2010 2130
2260 2370 2490
7.00-17 6
1850 1980
* 7.00-17 8 1850 1980 2110 2230 2350
7.00-18 8 1930 2060 2190 2330 2440
7.00-20 8 2070 2220
2370 2510 2630
* 7.00-20 10 2070 2220 2370 2510 2630 2760 2880 3000
7.50-17
8
2090 2230
2380
2530 2660 2780
7.50-18
8
2170 2320 2470 2620 2760 2900
7.50-20 8
2350 2520 2680 2840 2990 3120
* 7.50-20 10
2350 2520 2680 2840 2990 3120
3260 3400 3520
8.25-17
10
2440 2610 2780 2950 3100 3250 3400
8.25-18
10
2550 2740 2910 3080 3240 3390 3530
8.25-20
10
2740 2930 3110 3290 3470 3630 3800
* 8.25-20
12
2740 2930 3110 3290 3470 3630 3800 3940 4100 4250
9.00-18 10
3240 3440 3650 3840 4020 4200
9.00-20 10 3470 3690 3920 4130 4320 4510
* 9.00-20 12
3470 3690 3920 4130 4320 4510
4700 4880 5110
10.00-18 12
3850 4080 4290 4490 4700
4880
10
.
00-20 12
4100 4350 4580 4810 5030 5220
* 10 . 00-20 14
4100 4350 4580 4810 5030 5220
5420 5620 5940
10 . 00-22 12
4400 4650 4890 5130 5360 5560
*
10
.
00-22
14 4400
4650 4890
5130 5360 5560 5770 5990 6190
10.00-24 12
4650 4940 5180 5440 5680 5910
11 . 00-20 12
4630 4900 5150 5400 5640 5870
* 11 . 00-20 14 4630 4900 5150 5400 5640 5870 6090 6320 6530
11 . 00-22 12
4920 5220 5480 5760 6010
6250
*
11
.
00-22
14 4920 5220 5480 5760 6010 6250 6480 6730 6950
11.00-24 12
5220 5530 5810 6100 6370 6620
12 . 00-20 14 5800 6080 6360 6610 6860
12
.
00-22
14 6170 6460 6760 7010 7300
12.00-24 14 6530 6840 7160 7470 7730
NOTE 1: The selection of tire sizes for trucks and busses shall be based on meeting the requirements of tire load
conditions.
NOTE 2: Underscoring denotes maximum permissible loads. Minimum recommended cold inflation pressures for
various loads must conform to the table.
NOTE 3: For special operating conditions, cold inflation pressures may be increased up to 10# (not to exceed 100#)
above those indicated in the table with no increase in loads.
NOTE 4: * For extra ply tires, as noted by the asterisk, the widest recommended rim should be used.
NOTE 5:
For single wheel service consult rim and wheel manufacturers to determine if the rim and wheel are of
sufficient strength for the intended service.
TIRES USED AS DUALS
T ire
Size
Ply
Rating
Tire Load Limits at Various Inflation Pressures
40 45 50 55 60 65
70 75 80 85 90
6.50-20 6 1640 1760 1870
* 6.50-20 8
1640 1760 1870 1980 2080 2180
7.00-17 6 1620 1740
* 7.00-17 8
1620 1740 1850 1960 2060
7.00-18 8 1690
1810 1920 2040 2140
7.00-20 8 1820 1950
2080
2200
2310
* 7.00-20 10
1820 1950 2080 2200 2310
2420 2530 2630
(CONT’D.)
CHEVROLET TRUCK SERVICE MANUAL