Tire Load Index is a figure given to tires which lets a user know how much weight a given tire is designed to handle. In general, most cars are usually in the 2/3 of maximum for load. For example, a GVWR 4000lb car will probably come with an 87 rating tire, which is good for 1201 pounds a corner, or 4804 lbs total on an ideal 50/50 car (in theory. of course. There’s always the side to side and X cross weights to consider as well).
Most of the time, the size you require for your car only offers load indexes that are applicable. For example, I don’t think that a tire exists in a 315/40/17 for your corvette that comes with a 74 load index. They just simply aren’t made.
Below is a chart with the most common load ratings:
Tire Load Indexes
- Index
- Load (in Pounds)
- 74
- 827
- 75
- 853
- 76
- 882
- 77
- 908
- 78
- 937
- 79
- 963
- 80
- 992
- 81
- 1019
- 82
- 1047
- 83
- 1074
- 84
- 1102
- 85
- 1135
- 86
- 1168
- 87
- 1201
- 88
- 1235
- 89
- 1279
- 90
- 1323
- 91
- 1356
- 92
- 1389
- 93
- 1433
- 94
- 1477
- 95
- 1521
- 96
- 1565
- 97
- 1609
- 98
- 1653
- 99
- 1709
- 100
- 1764
- 101
- 1819
- 102
- 1874
- 103
- 1929
- 104
- 1984
- 105
- 2039
- 106
- 2094
- 107
- 2149
- 108
- 2205
- 109
- 2271
- 110
- 2337
- 111
- 2403
- 112
- 2469
- 113
- 2535
- 114
- 2601
- 115
- 2679
- 116
- 2756
- 117
- 2833
- 118
- 2910
- 119
- 2998
- 120
- 3086
- 121
- 3197
- 122
- 3307
- 123
- 3417
- 124
- 3527
- 125
- 3638
- 126
- 3748
- 127
- 3858
- 128
- 3968
- 129
- 4079
- 130
- 4189
- 131
- 4299
- 132
- 4409
- 133
- 4541
- 134
- 4674
- 135
- 4806
- 136
- 4938
- 137
- 5071
- 138
- 5203
- 139
- 5357
- 140
- 5512
- 141
- 5677
- 142
- 5842
- 143
- 6008
- 144
- 6173
- 145
- 6393
- 146
- 6614
- 147
- 6779
- 148
- 6944
- 149
- 7165
- 150
- 7385
