Home › 20" tire sizes › 275/65R20
275/65R20 tire size in inches
275/65R20 is 34.07" tall and 10.83" wide, and fits a 20" rim. In flotation (inch) sizing that is roughly 34.1x10.8R20.
275/65R20 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 34.07" | 866 mm |
| Section width | 10.83" | 275 mm |
| Sidewall height | 7.04" | 178.8 mm |
| Rim diameter | 20" | 508.0 mm |
| Circumference | 107.0" | 2719 mm |
| Revolutions per mile | 592 | |
| Aspect ratio | 65% (sidewall is 65% of the width) | |
Drawn to scale
Among the 131 sizes for 20" wheels on this site, 275/65R20 is #85 by height (shortest: 225/30R20, tallest: 365/85R20).
What people compare 275/65R20 with
Real comparisons drivers search for, worked out against 275/65R20:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 275/60R20 | -1.08" (-3.17%) | 0.00" | -0.54" | 62 mph |
| 275/55R20 | -2.16" (-6.34%) | 0.00" | -1.09" | 64.1 mph |
| 285/60R20 | -0.61" (-1.79%) | +0.39" | -0.31" | 61.1 mph |
| 285/65R20 | +0.52" (+1.53%) | +0.39" | +0.25" | 59.1 mph |
| 295/65R20 | +1.03" (+3.02%) | +0.78" | +0.51" | 58.2 mph |
| 295/60R20 | -0.13" (-0.38%) | +0.78" | -0.07" | 60.2 mph |
| 305/55R20 | -0.86" (-2.52%) | +1.18" | -0.44" | 61.6 mph |
| 275/70R18 | -0.91" (-2.67%) | 0.00" | +0.54" | 61.6 mph |
How the 275/65R20 numbers are worked out
The size code reads as 275 mm section width, 65% aspect ratio, R for radial construction and 20-inch wheel.
- Sidewall = 275 × 65% = 178.8 mm = 7.04"
- Diameter = 20" + 2 × 7.04" = 34.07"
- Circumference = π × 34.07" = 107.0"
- Revs per mile = 63,360" ÷ 107.0" = 592
Sizes that can replace 275/65R20 on a 20" wheel
Within 3% of 34.07". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 325/55R20 | 34.07" | 12.80" | 0% | 60 mph |
| 255/70R20 | 34.06" | 10.04" | -0.03% | 60 mph |
| 355/50R20 | 33.98" | 13.98" | -0.26% | 60.2 mph |
| 295/60R20 | 33.94" | 11.61" | -0.38% | 60.2 mph |
| 270/65R20 | 33.82" | 10.63" | -0.73% | 60.4 mph |
| 280/65R20 | 34.33" | 11.02" | +0.76% | 59.5 mph |
| 305/60R20 | 34.41" | 12.01" | +1% | 59.4 mph |
| 290/60R20 | 33.70" | 11.42" | -1.09% | 60.7 mph |
| 315/55R20 | 33.64" | 12.40" | -1.26% | 60.8 mph |
| 265/65R20 | 33.56" | 10.43" | -1.5% | 60.9 mph |
| 285/65R20 | 34.59" | 11.22" | +1.53% | 59.1 mph |
| 265/70R20 | 34.61" | 10.43" | +1.58% | 59.1 mph |
One size wider or narrower
Same height on a different wheel size
- 325/75R15 15" (+0.35%)
- 315/75R15 15" (-1.38%)
- 305/75R16 16" (-0.18%)
- 285/80R16 16" (-0.35%)
- 325/70R16 16" (-0.47%)
- 265/85R16 16" (-0.97%)
- 275/85R16 16" (+1%)
- 295/80R16 16" (+1.5%)
- 315/75R16 16" (+1.56%)
- 295/75R16 16" (-1.91%)
Questions about 275/65R20
How tall is a 275/65R20 tire in inches?
A 275/65R20 tire is 34.07 inches (866 mm) tall: the 20-inch rim plus two sidewalls of 7.04 inches each.
Is 275/65R20 a 34 inch tire?
Yes. At 34.07 inches tall it is commonly called a 34-inch tire.
How many revolutions per mile does a 275/65R20 make?
About 592 revolutions per mile, based on a calculated circumference of 107.0 inches.
What size can replace 275/65R20?
325/55R20 is the closest match on a 20" rim (0% height). Check load index, speed rating and clearance first.
Compare 275/65R20 against any other size with the tire size calculator.