Tire Specification
The sidewall provides valuable information about the tire including the specifications, the brand, and the type of construction. All numbers are standardized and recognized by tire manufacturers around the world.
Codes:
- Section Width (mm)
- Aspect Ratio (Section height as a percentage of the section width).
- Rim Diameter(in)
- Load Index
- Speed Rating
Load Index and Speed Rating
Load index corresponds to the load capacity while speed rating is designated using letters from J to Z and represents the maximum speed of the tire. These two factors are interdependent. Please refer to the tables below for the load index and speed rating.
Load Index (Maximum Load)
| LI | lbs | kg |
|---|---|---|
| 71 | 761 | 345 |
| 72 | 783 | 355 |
| 73 | 805 | 365 |
| 74 | 827 | 375 |
| 75 | 853 | 387 |
| 76 | 882 | 400 |
| 77 | 908 | 412 |
| 78 | 937 | 425 |
| 79 | 963 | 437 |
| 80 | 992 | 450 |
| 81 | 1019 | 462 |
| 82 | 1047 | 475 |
| 83 | 1074 | 487 |
| 84 | 1102 | 500 |
| 85 | 1135 | 515 |
| 86 | 1168 | 530 |
| 87 | 1201 | 545 |
| 88 | 1235 | 560 |
| 89 | 1279 | 580 |
| 90 | 1323 | 600 |
| 91 | 1356 | 615 |
| 92 | 1389 | 630 |
| 93 | 1433 | 650 |
| 94 | 1477 | 670 |
| 95 | 1521 | 690 |
| 96 | 1565 | 710 |
| 97 | 1609 | 730 |
| 98 | 1653 | 750 |
| 99 | 1709 | 775 |
| 100 | 1764 | 800 |
| 101 | 1819 | 825 |
| 102 | 1874 | 850 |
| 103 | 1929 | 875 |
| 104 | 1984 | 900 |
| 105 | 2039 | 925 |
| 106 | 2094 | 950 |
| 107 | 2149 | 975 |
| 108 | 2205 | 1000 |
| 109 | 2271 | 1030 |
| 110 | 2337 | 1060 |
Speed Rating (Maximum Speed)
| Symbol | Max Speed (mph) |
|---|---|
| Q | 99 mph |
| R | 106 mph |
| S | 112 mph |
| T | 118 mph |
| U | 124 mph |
| H | 130 mph |
| V | 149 mph |
| W | 168 mph |
| Y | 186 mph |