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275/70R20 tire size in inches
275/70R20 is 35.16" tall and 10.83" wide, and fits a 20" rim. In flotation (inch) sizing that is roughly 35.2x10.8R20.
275/70R20 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 35.16" | 893 mm |
| Section width | 10.83" | 275 mm |
| Sidewall height | 7.58" | 192.5 mm |
| Rim diameter | 20" | 508.0 mm |
| Circumference | 110.5" | 2805 mm |
| Revolutions per mile | 574 | |
| Aspect ratio | 70% (sidewall is 70% of the width) | |
Drawn to scale
Among the 131 sizes for 20" wheels on this site, 275/70R20 is #97 by height (shortest: 225/30R20, tallest: 365/85R20).
275/70R20 against the most popular 20" sizes
| Popular size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 275/60R20 | -2.17" (-6.17%) | 0.00" | -1.08" | 63.9 mph |
| 275/65R20 | -1.09" (-3.1%) | 0.00" | -0.54" | 61.9 mph |
| 275/55R20 | -3.25" (-9.24%) | 0.00" | -1.63" | 66.1 mph |
| 305/55R20 | -1.95" (-5.55%) | +1.18" | -0.98" | 63.5 mph |
| 295/65R20 | -0.06" (-0.17%) | +0.78" | -0.03" | 60.1 mph |
How the 275/70R20 numbers are worked out
The size code reads as 275 mm section width, 70% aspect ratio, R for radial construction and 20-inch wheel.
- Sidewall = 275 × 70% = 192.5 mm = 7.58"
- Diameter = 20" + 2 × 7.58" = 35.16"
- Circumference = π × 35.16" = 110.5"
- Revs per mile = 63,360" ÷ 110.5" = 574
Sizes that can replace 275/70R20 on a 20" wheel
Within 3% of 35.16". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 320/60R20 | 35.12" | 12.60" | -0.11% | 60.1 mph |
| 295/65R20 | 35.10" | 11.61" | -0.17% | 60.1 mph |
| 255/75R20 | 35.06" | 10.04" | -0.28% | 60.2 mph |
| 325/60R20 | 35.35" | 12.80" | +0.54% | 59.7 mph |
| 355/55R20 | 35.37" | 13.98" | +0.6% | 59.6 mph |
| 345/55R20 | 34.94" | 13.58" | -0.63% | 60.4 mph |
| 280/70R20 | 35.43" | 11.02" | +0.77% | 59.5 mph |
| 315/60R20 | 34.88" | 12.40" | -0.8% | 60.5 mph |
| 290/65R20 | 34.84" | 11.42" | -0.91% | 60.6 mph |
| 305/65R20 | 35.61" | 12.01" | +1.28% | 59.2 mph |
| 265/75R20 | 35.65" | 10.43" | +1.39% | 59.2 mph |
| 285/70R20 | 35.71" | 11.22" | +1.56% | 59.1 mph |
One size wider or narrower
- Narrower: 265/70R20 — 10.43" wide, 34.61" tall
- Wider: 285/70R20 — 11.22" wide, 35.71" tall
Same height on a different wheel size
- 325/75R16 16" (+0.09%)
- 375/65R16 16" (+0.09%)
- 305/80R16 16" (+0.14%)
- 285/85R16 16" (-0.26%)
- 315/75R16 16" (-1.59%)
- 295/85R16 16" (+1.65%)
- 295/80R16 16" (-1.65%)
- 335/75R16 16" (+1.76%)
- 315/80R16 16" (+1.93%)
- 305/75R17 17" (-0.43%)
Questions about 275/70R20
How tall is a 275/70R20 tire in inches?
A 275/70R20 tire is 35.16 inches (893 mm) tall: the 20-inch rim plus two sidewalls of 7.58 inches each.
Is 275/70R20 a 35 inch tire?
Yes. At 35.16 inches tall it is commonly called a 35-inch tire.
How many revolutions per mile does a 275/70R20 make?
About 574 revolutions per mile, based on a calculated circumference of 110.5 inches.
What size can replace 275/70R20?
320/60R20 is the closest match on a 20" rim (-0.11% height). Check load index, speed rating and clearance first.
Compare 275/70R20 against any other size with the tire size calculator.