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265/65R20 tire size in inches
265/65R20 is 33.56" tall and 10.43" wide, and fits a 20" rim. In flotation (inch) sizing that is roughly 33.6x10.4R20.
265/65R20 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 33.56" | 853 mm |
| Section width | 10.43" | 265 mm |
| Sidewall height | 6.78" | 172.2 mm |
| Rim diameter | 20" | 508.0 mm |
| Circumference | 105.4" | 2678 mm |
| Revolutions per mile | 601 | |
| Aspect ratio | 65% (sidewall is 65% of the width) | |
Drawn to scale
Among the 131 sizes for 20" wheels on this site, 265/65R20 is #78 by height (shortest: 225/30R20, tallest: 365/85R20).
265/65R20 against the most popular 20" sizes
| Popular size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 275/60R20 | -0.57" (-1.7%) | +0.40" | -0.28" | 61 mph |
| 275/65R20 | +0.51" (+1.52%) | +0.40" | +0.26" | 59.1 mph |
| 275/55R20 | -1.65" (-4.92%) | +0.40" | -0.83" | 63.1 mph |
| 305/55R20 | -0.35" (-1.04%) | +1.58" | -0.18" | 60.6 mph |
| 295/65R20 | +1.54" (+4.59%) | +1.18" | +0.77" | 57.4 mph |
How the 265/65R20 numbers are worked out
The size code reads as 265 mm section width, 65% aspect ratio, R for radial construction and 20-inch wheel.
- Sidewall = 265 × 65% = 172.2 mm = 6.78"
- Diameter = 20" + 2 × 6.78" = 33.56"
- Circumference = π × 33.56" = 105.4"
- Revs per mile = 63,360" ÷ 105.4" = 601
Sizes that can replace 265/65R20 on a 20" wheel
Within 3% of 33.56". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 315/55R20 | 33.64" | 12.40" | +0.24% | 59.9 mph |
| 285/60R20 | 33.46" | 11.22" | -0.3% | 60.2 mph |
| 290/60R20 | 33.70" | 11.42" | +0.42% | 59.8 mph |
| 270/65R20 | 33.82" | 10.63" | +0.77% | 59.5 mph |
| 375/45R20 | 33.29" | 14.76" | -0.8% | 60.5 mph |
| 280/60R20 | 33.23" | 11.02" | -0.98% | 60.6 mph |
| 305/55R20 | 33.21" | 12.01" | -1.04% | 60.6 mph |
| 295/60R20 | 33.94" | 11.61" | +1.13% | 59.3 mph |
| 355/50R20 | 33.98" | 13.98" | +1.25% | 59.3 mph |
| 255/70R20 | 34.06" | 10.04" | +1.49% | 59.1 mph |
| 275/65R20 | 34.07" | 10.83" | +1.52% | 59.1 mph |
| 325/55R20 | 34.07" | 12.80" | +1.52% | 59.1 mph |
One size wider or narrower
- Narrower: 255/65R20 — 10.04" wide, 33.05" tall
- Wider: 275/65R20 — 10.83" wide, 34.07" tall
Same height on a different wheel size
- 315/75R15 15" (+0.12%)
- 305/75R15 15" (-1.64%)
- 325/75R15 15" (+1.88%)
- 295/75R16 16" (-0.42%)
- 265/85R16 16" (+0.54%)
- 315/70R16 16" (-0.6%)
- 275/80R16 16" (-0.72%)
- 325/70R16 16" (+1.04%)
- 285/80R16 16" (+1.16%)
- 305/75R16 16" (+1.34%)
Questions about 265/65R20
How tall is a 265/65R20 tire in inches?
A 265/65R20 tire is 33.56 inches (853 mm) tall: the 20-inch rim plus two sidewalls of 6.78 inches each.
Is 265/65R20 a 34 inch tire?
Yes. At 33.56 inches tall it is commonly called a 34-inch tire.
How many revolutions per mile does a 265/65R20 make?
About 601 revolutions per mile, based on a calculated circumference of 105.4 inches.
What size can replace 265/65R20?
315/55R20 is the closest match on a 20" rim (+0.24% height). Check load index, speed rating and clearance first.
Compare 265/65R20 against any other size with the tire size calculator.