Sport IV
21 tire lines and 21 grade rows in the NHTSA ratings file. Treadwear spans 260–620.
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 |
|---|---|---|---|---|
| CASCADE | 1 | 520 | A | B |
| FIRENZA ST-01A | 1 | 360 | A | A |
| FIRENZA ST-06 (H, V, W rated) | 1 | 420 | A | A |
| FIRENZA ST-06 (T rated) | 1 | 420 | A | B |
| GT Radial Trac | 1 | 440 | A | B |
| MEGA METRIC II | 1 | 260 | B | B |
| MEGA TORQUE I | 1 | 360 | A | A |
| MEGA TORQUE II | 1 | 280 | A | A |
| PREMIUM PLUS II (H RATED) | 1 | 420 | A | A |
| PREMIUM PLUS II (T RATED) | 1 | 620 | A | B |
| PREMIUM PLUS II (V RATED) | 1 | 360 | A | A |
| SLT Trail Climber | 1 | 500 | A | B |
| SN3606 | 1 | 500 | A | B |
| SN3630 | 1 | 280 | A | A |
| SN3800 | 1 | 420 | A | A |
| SN3820 | 1 | 420 | A | A |
| SN3870 | 1 | 420 | A | A |
| SN3890 | 1 | 420 | A | A |
| SN3970 | 1 | 280 | A | A |
| SN3980 | 1 | 420 | A | A |
| TRIAL CLIMBER ALL TERRAIN | 1 | 460 | A | B |