Tire sizes
What size is a 31-inch tire?
These common sizes all measure between 30.5 and 31.5 inches tall, so they get called 31s. Pick one for its exact dimensions.
| Size | Height | Width | Wheel |
|---|---|---|---|
| 31x10.50R15 | 31.0 in | 10.5 in | 15 in |
| 265/70R16 | 30.6 in | 10.4 in | 16 in |
| 245/70R17 | 30.5 in | 9.6 in | 17 in |
| 265/65R17 | 30.6 in | 10.4 in | 17 in |
| 255/70R17 | 31.1 in | 10.0 in | 17 in |
| 275/65R17 | 31.1 in | 10.8 in | 17 in |
| 245/75R17 | 31.5 in | 9.6 in | 17 in |
| 265/60R18 | 30.5 in | 10.4 in | 18 in |
| 275/60R18 | 31.0 in | 10.8 in | 18 in |
| 255/65R18 | 31.1 in | 10.0 in | 18 in |
| 285/60R18 | 31.5 in | 11.2 in | 18 in |
| 275/50R20 | 30.8 in | 10.8 in | 20 in |
| 255/55R20 | 31.0 in | 10.0 in | 20 in |
| 285/50R20 | 31.2 in | 11.2 in | 20 in |
| 265/55R20 | 31.5 in | 10.4 in | 20 in |
Questions
What size is a 31-inch tire in metric?
Metric sizes that measure between 30.5 and 31.5 inches tall include 265/70R16, 245/70R17, 265/65R17, 255/70R17, 275/65R17, 245/75R17, 265/60R18, 275/60R18, 255/65R18, 285/60R18.
Is a 31-inch tire exactly 31 inches tall?
Not always. '31s' is a class: metric sizes from about 30.5 to 31.5 inches get called 31s, and inch-sized tires often measure a little under their label once mounted.
Nominal dimensions. Fitment depends on your vehicle, lift and wheels. Updated 2026-11-14.