37.0" tall, 11.5" wide on a 20" wheel
A 37x11.50R20 tire is 37.0 inches tall and 11.5 inches wide and mounts on a 20-inch wheel, which leaves a 8.5-inch sidewall. It turns about 545 times per mile.
The size most often compared with it is 295/70R20, which is 0.7" shorter (−2.0%). At an indicated 60 mph you would be doing 58.8 mph on it.
| Current | New | Difference |
|---|
| Shows | Actual speed |
|---|
Same 20" wheel, within 20 mm of width and 10 points of aspect ratio.
| Size | Diameter | Width | Sidewall | vs 37x11.50R20 | |
|---|---|---|---|---|---|
| 295/70R20 | 36.3" | 11.6" | 8.1" | −2.0% | |
| 275/75R20 | 36.2" | 10.8" | 8.1" | −2.1% | |
| 285/70R20 | 35.7" | 11.2" | 7.9" | −3.5% | |
| 305/65R20 | 35.6" | 12.0" | 7.8" | −3.8% | |
| 275/70R20 | 35.2" | 10.8" | 7.6" | −5.0% | |
| 295/65R20 | 35.1" | 11.6" | 7.5" | −5.1% | |
| 35x11.50R20 | 35.0" | 11.5" | 7.5" | −5.4% | |
| 285/65R20 | 34.6" | 11.2" | 7.3" | −6.5% | |
| 275/65R20 | 34.1" | 10.8" | 7.0" | −7.9% |
Sizes within 2% of 37.0" on 18" or 22" wheels.
| Size | Diameter | Width | Sidewall | vs 37x11.50R20 | |
|---|---|---|---|---|---|
| 37x12.50R18 | 37.0" | 12.5" | 9.5" | ±0.0% | |
| 37x12.50R22 | 37.0" | 12.5" | 7.5" | ±0.0% | |
| 37x13.50R18 | 37.0" | 13.5" | 9.5" | ±0.0% | |
| 37x13.50R22 | 37.0" | 13.5" | 7.5" | ±0.0% | |
| 275/85R18 | 36.4" | 10.8" | 9.2" | −1.6% |
Actual speed when the speedometer is calibrated for 37x11.50R20.
| Speedometer shows | on 295/70R20 | on 275/75R20 | on 285/70R20 |
|---|---|---|---|
| 30 mph | 29.4 mph | 29.4 mph | 29.0 mph |
| 45 mph | 44.1 mph | 44.1 mph | 43.4 mph |
| 60 mph | 58.8 mph | 58.8 mph | 57.9 mph |
| 70 mph | 68.6 mph | 68.6 mph | 67.6 mph |
37.0 inches (940 mm), with a 8.5-inch sidewall on a 20-inch wheel.
There is no common metric size within half an inch of 37.0".
About 545, or 339 per kilometer.