Firestone AFFINITY AS
Treadwear 500. Traction AA. Temperature A. Construction: Radial.
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.
Every size series for this line carries the same grades in the NHTSA file. The size strings below are unchanged from that file.
| Size series | Treadwear | Traction | Temperature | Construction |
|---|---|---|---|---|
| 215/45R17 | 500 | AA | A | Radial |
| 225/40R18 | 500 | AA | A | Radial |
| 225/45R17 | 500 | AA | A | Radial |
| 245/45R18 | 500 | AA | A | Radial |
Read the grades
What UTQG treadwear, traction, and temperature mean. The numbers compare tires on a government test. They are not a mileage warranty.
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NHTSA record ids in this line
854831, 854833, 854830, 854832