The tire load index is a numerical code on the tire sidewall that corresponds to the maximum weight each tire can safely support when properly inflated. Choosing tires with the correct load index is critical for safety and handling.
The load index is a standardized numerical rating that tells you the maximum load capacity of a tire at its maximum inflation pressure. It appears in the tire's size designation after the diameter — for example, in "P215/65R16 98H", the "98" is the load index. It's not in pounds directly; you reference a standardized chart to get the actual weight.
Common load index values for passenger vehicles range from 70 (739 lbs) to 110 (2,337 lbs). Frequently encountered values: 88 = 1,235 lbs, 91 = 1,356 lbs, 94 = 1,477 lbs, 97 = 1,609 lbs, 100 = 1,764 lbs, 103 = 1,929 lbs, 106 = 2,094 lbs. Light trucks and SUVs may use values up to 126 (3,748 lbs).
The load index is the two- or three-digit number immediately following the wheel diameter in the tire's size code. It is also printed separately in the tire's service description on the sidewall. The speed rating letter follows immediately after the load index (e.g., "98H").
Light truck and commercial tires sometimes show dual load ratings (e.g., 121/118R) — the first number is the load capacity when that tire is used as a single, and the second is the capacity in a dual-wheel (super-single) configuration. Always use the appropriate rating for your vehicle's configuration.
