35.2" tall, 10.8" wide, 7.6" sidewall
A 275/70R20 tire is 35.2 inches (893 mm) tall and 10.8 inches wide. The sidewall is 70% of the width, 7.6 inches, on a 20-inch wheel, and the tire turns about 574 times per mile.
In flotation terms that is about 35.2x10.8R20, closest to the common 35x11.50R20 (35.0"). People often call it a 35-inch tire.
The size most often compared with it is 275/65R20, which is 1.1" shorter (−3.1%). At an indicated 60 mph you would be doing 58.2 mph on it, more than the 3% change many shops use as a limit.
| 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 275/70R20 | |
|---|---|---|---|---|---|
| 295/65R20 | 35.1" | 11.6" | 7.5" | −0.2% | |
| 35x11.50R20 | 35.0" | 11.5" | 7.5" | −0.4% | |
| 265/75R20 | 35.6" | 10.4" | 7.8" | +1.4% | |
| 265/70R20 | 34.6" | 10.4" | 7.3" | −1.6% | |
| 285/70R20 | 35.7" | 11.2" | 7.9" | +1.6% | |
| 285/65R20 | 34.6" | 11.2" | 7.3" | −1.6% | |
| 275/65R20 | 34.1" | 10.8" | 7.0" | −3.1% | compare |
| 275/75R20 | 36.2" | 10.8" | 8.1" | +3.1% | |
| 295/70R20 | 36.3" | 11.6" | 8.1" | +3.1% | |
| 295/60R20 | 33.9" | 11.6" | 7.0" | −3.5% |
Sizes within 2% of 35.2" on 22" or 18" wheels.
| Size | Diameter | Width | Sidewall | vs 275/70R20 | |
|---|---|---|---|---|---|
| 305/55R22 | 35.2" | 12.0" | 6.6" | +0.1% | |
| 35x12.50R18 | 35.0" | 12.5" | 8.5" | −0.4% | |
| 35x12.50R22 | 35.0" | 12.5" | 6.5" | −0.4% | |
| 275/60R22 | 35.0" | 10.8" | 6.5" | −0.5% | |
| 275/80R18 | 35.3" | 10.8" | 8.7" | +0.5% | |
| 315/70R18 | 35.4" | 12.4" | 8.7" | +0.6% |
Actual speed when the speedometer is calibrated for 275/70R20.
| Speedometer shows | on 275/65R20 | on 295/65R20 | on 35x11.50R20 |
|---|---|---|---|
| 30 mph | 29.1 mph | 29.9 mph | 29.9 mph |
| 45 mph | 43.6 mph | 44.9 mph | 44.8 mph |
| 60 mph | 58.2 mph | 59.9 mph | 59.7 mph |
| 70 mph | 67.8 mph | 69.9 mph | 69.7 mph |
35.2 inches (893 mm). The sidewall is 7.6 inches.
10.8 inches (275 mm) section width, measured sidewall to sidewall.
About 35.2x10.8R20; the closest common flotation size is 35x11.50R20 at 35.0".
275/65R20 is −3.1% in diameter, more than the common 3% guideline, so expect a speedometer error and check clearance. It is 0.0" wider.