Sonar
10 tire lines and 11 grade rows in the NHTSA ratings file. Treadwear spans 160–700.
About this data
These are rows in NHTSA's ratings list, under the brand string that list stores. The list does not say whether a tire is still sold, and it has no category field. Light-truck tires, deep-tread winter-type snow tires, and temporary spare tires are outside the UTQG rule, so a missing line is not a grade. Sorting these rows is an ordering of NHTSA's list, not a ranking of the best tire. Data last verified October 21, 2026 (UTC). Data-quality notes.
| Tire line | Size rows | Treadwear | Traction | Temperature |
|---|---|---|---|---|
| HTR40Z | 1 | 160 | A | A |
| HTR45Z | 1 | 160 | A | A |
| HTR55Z | 1 | 160 | A | A |
| HTRZⅡ | 1 | 360 | A | A |
| HTRZⅢ | 1 | 300 | AA | A |
| SL850 | 1 | 300 | B | B |
| TOUR LXH (Extra Load) | 1 | 440 | A | A |
| TOUR LXH (Standard Load) | 1 | 600 | A | A |
| Tour Plus LST | 1 | 700 | A | B |
| TOUR PLUS LSV | 2 | 440–600 | A | A |