Home › 20" tire sizes › 265/55R20
265/55R20 tire size in inches
265/55R20 is 31.48" tall and 10.43" wide, and fits a 20" rim. In flotation (inch) sizing that is roughly 31.5x10.4R20.
265/55R20 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 31.48" | 800 mm |
| Section width | 10.43" | 265 mm |
| Sidewall height | 5.74" | 145.8 mm |
| Rim diameter | 20" | 508.0 mm |
| Circumference | 98.9" | 2512 mm |
| Revolutions per mile | 641 | |
| Aspect ratio | 55% (sidewall is 55% of the width) | |
Drawn to scale
Among the 131 sizes for 20" wheels on this site, 265/55R20 is #54 by height (shortest: 225/30R20, tallest: 365/85R20).
What people compare 265/55R20 with
Real comparisons drivers search for, worked out against 265/55R20:
| Compared size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 275/55R20 | +0.43" (+1.37%) | +0.40" | +0.21" | 59.2 mph |
265/55R20 against the most popular 20" sizes
| Popular size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 275/60R20 | +1.51" (+4.8%) | +0.40" | +0.76" | 57.3 mph |
| 275/65R20 | +2.59" (+8.23%) | +0.40" | +1.30" | 55.4 mph |
| 305/55R20 | +1.73" (+5.5%) | +1.58" | +0.86" | 56.9 mph |
| 295/65R20 | +3.62" (+11.5%) | +1.18" | +1.81" | 53.8 mph |
| 295/60R20 | +2.46" (+7.81%) | +1.18" | +1.23" | 55.7 mph |
How the 265/55R20 numbers are worked out
The size code reads as 265 mm section width, 55% aspect ratio, R for radial construction and 20-inch wheel.
- Sidewall = 265 × 55% = 145.8 mm = 5.74"
- Diameter = 20" + 2 × 5.74" = 31.48"
- Circumference = π × 31.48" = 98.9"
- Revs per mile = 63,360" ÷ 98.9" = 641
Sizes that can replace 265/55R20 on a 20" wheel
Within 3% of 31.48". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 325/45R20 | 31.52" | 12.80" | +0.13% | 59.9 mph |
| 245/60R20 | 31.57" | 9.65" | +0.29% | 59.8 mph |
| 295/50R20 | 31.61" | 11.61" | +0.41% | 59.8 mph |
| 270/55R20 | 31.69" | 10.63" | +0.67% | 59.6 mph |
| 285/50R20 | 31.22" | 11.22" | -0.83% | 60.5 mph |
| 355/40R20 | 31.18" | 13.98" | -0.95% | 60.6 mph |
| 315/45R20 | 31.16" | 12.40" | -1.02% | 60.6 mph |
| 235/60R20 | 31.10" | 9.25" | -1.21% | 60.7 mph |
| 275/55R20 | 31.91" | 10.83" | +1.37% | 59.2 mph |
| 255/55R20 | 31.04" | 10.04" | -1.4% | 60.9 mph |
| 305/50R20 | 32.01" | 12.01" | +1.68% | 59 mph |
| 235/65R20 | 32.03" | 9.25" | +1.75% | 59 mph |
One size wider or narrower
- Narrower: 255/55R20 — 10.04" wide, 31.04" tall
- Wider: 275/55R20 — 10.83" wide, 31.91" tall
Same height on a different wheel size
- 245/85R15 15" (-0.25%)
- 265/80R15 15" (+0.67%)
- 295/70R15 15" (-0.7%)
- 275/75R15 15" (-0.76%)
- 305/70R15 15" (+1.05%)
- 285/75R15 15" (+1.11%)
- 255/80R15 15" (-1.33%)
- 255/85R15 15" (+1.87%)
- 245/80R16 16" (-0.16%)
- 280/70R16 16" (-0.16%)
Questions about 265/55R20
How tall is a 265/55R20 tire in inches?
A 265/55R20 tire is 31.48 inches (800 mm) tall: the 20-inch rim plus two sidewalls of 5.74 inches each.
Is 265/55R20 a 31 inch tire?
Yes. At 31.48 inches tall it is commonly called a 31-inch tire.
How many revolutions per mile does a 265/55R20 make?
About 641 revolutions per mile, based on a calculated circumference of 98.9 inches.
What size can replace 265/55R20?
325/45R20 is the closest match on a 20" rim (+0.13% height). Check load index, speed rating and clearance first.
Compare 265/55R20 against any other size with the tire size calculator.