Bridgestone B381
Treadwear 240–340. Traction A, B. Temperature B. 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.
Grades can differ by the size series NHTSA published. Size text is shown as published, not converted into a standard size code.
| Size series | Treadwear | Traction | Temperature | Construction |
|---|---|---|---|---|
| All sizes except | 340 | A | B | Radial |
| P145/80R14 | 240 | B | B | Radial |
| P155/65R14 | 240 | B | B | Radial |
| P175/65R15 | 240 | A | B | Radial |
| P185/64R14 "S" | 260 | A | B | Radial |
| P185/65R14 "T" | 240 | A | B | Radial |
| P185/70R14 | 240 | B | B | 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
852889, 852890, 852891, 852892, 852893, 852894, 852895