37.0" tall, 12.5" wide on a 17" wheel
A 37x12.50R17 tire is 37.0 inches tall and 12.5 inches wide and mounts on a 17-inch wheel, which leaves a 10.0-inch sidewall. It turns about 545 times per mile.
The size most often compared with it is 315/75R17, which is 1.4" shorter (−3.8%). At an indicated 60 mph you would be doing 57.7 mph on it, more than the 3% change many shops use as a limit.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 17" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 37x12.50R17 | |
|---|---|---|---|---|---|
| 315/75R17 | 35.6" | 12.4" | 9.3" | −3.8% | |
| 305/75R17 | 35.0" | 12.0" | 9.0" | −5.4% | |
| 35x12.50R17 | 35.0" | 12.5" | 9.0" | −5.4% | |
| 325/70R17 | 34.9" | 12.8" | 9.0" | −5.6% | |
| 315/70R17 | 34.4" | 12.4" | 8.7" | −7.1% | |
| 305/70R17 | 33.8" | 12.0" | 8.4" | −8.6% |
Sizes within 2% of 37.0" on 18" or 16" wheels.
| Size | Diameter | Width | Sidewall | vs 37x12.50R17 | |
|---|---|---|---|---|---|
| 37x12.50R18 | 37.0" | 12.5" | 9.5" | ±0.0% | |
| 37x13.50R18 | 37.0" | 13.5" | 9.5" | ±0.0% | |
| 325/80R16 | 36.5" | 12.8" | 10.2" | −1.4% | |
| 275/85R18 | 36.4" | 10.8" | 9.2" | −1.6% |
Actual speed when the speedometer is calibrated for 37x12.50R17.
| Speedometer shows | on 315/75R17 | on 305/75R17 | on 35x12.50R17 |
|---|---|---|---|
| 30 mph | 28.9 mph | 28.4 mph | 28.4 mph |
| 45 mph | 43.3 mph | 42.6 mph | 42.6 mph |
| 60 mph | 57.7 mph | 56.8 mph | 56.8 mph |
| 70 mph | 67.4 mph | 66.2 mph | 66.2 mph |
37.0 inches (940 mm), with a 10.0-inch sidewall on a 17-inch wheel.
There is no common metric size within half an inch of 37.0".
About 545, or 339 per kilometer.