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315/60R20 tire size in inches
315/60R20 is 34.88" tall and 12.40" wide, and fits a 20" rim. In flotation (inch) sizing that is roughly 34.9x12.4R20.
315/60R20 dimensions
| Measurement | Inches | Metric |
|---|---|---|
| Overall diameter (height) | 34.88" | 886 mm |
| Section width | 12.40" | 315 mm |
| Sidewall height | 7.44" | 189.0 mm |
| Rim diameter | 20" | 508.0 mm |
| Circumference | 109.6" | 2783 mm |
| Revolutions per mile | 578 | |
| Aspect ratio | 60% (sidewall is 60% of the width) | |
Drawn to scale
Among the 131 sizes for 20" wheels on this site, 315/60R20 is #92 by height (shortest: 225/30R20, tallest: 365/85R20).
315/60R20 against the most popular 20" sizes
| Popular size | Height | Width | Sidewall | Speedo at true 60 |
|---|---|---|---|---|
| 275/60R20 | -1.89" (-5.42%) | -1.57" | -0.94" | 63.4 mph |
| 275/65R20 | -0.81" (-2.32%) | -1.57" | -0.40" | 61.4 mph |
| 275/55R20 | -2.97" (-8.51%) | -1.57" | -1.49" | 65.6 mph |
| 305/55R20 | -1.67" (-4.79%) | -0.39" | -0.84" | 63 mph |
| 295/65R20 | +0.22" (+0.63%) | -0.79" | +0.11" | 59.6 mph |
How the 315/60R20 numbers are worked out
The size code reads as 315 mm section width, 60% aspect ratio, R for radial construction and 20-inch wheel.
- Sidewall = 315 × 60% = 189.0 mm = 7.44"
- Diameter = 20" + 2 × 7.44" = 34.88"
- Circumference = π × 34.88" = 109.6"
- Revs per mile = 63,360" ÷ 109.6" = 578
Sizes that can replace 315/60R20 on a 20" wheel
Within 3% of 34.88". Last column: speedometer reading at a true 60 mph.
| Size | Diameter | Width | Difference | Speedo at true 60 mph |
|---|---|---|---|---|
| 290/65R20 | 34.84" | 11.42" | -0.11% | 60.1 mph |
| 345/55R20 | 34.94" | 13.58" | +0.17% | 59.9 mph |
| 255/75R20 | 35.06" | 10.04" | +0.52% | 59.7 mph |
| 295/65R20 | 35.10" | 11.61" | +0.63% | 59.6 mph |
| 320/60R20 | 35.12" | 12.60" | +0.69% | 59.6 mph |
| 265/70R20 | 34.61" | 10.43" | -0.77% | 60.5 mph |
| 275/70R20 | 35.16" | 10.83" | +0.8% | 59.5 mph |
| 285/65R20 | 34.59" | 11.22" | -0.83% | 60.5 mph |
| 325/60R20 | 35.35" | 12.80" | +1.35% | 59.2 mph |
| 305/60R20 | 34.41" | 12.01" | -1.35% | 60.8 mph |
| 355/55R20 | 35.37" | 13.98" | +1.4% | 59.2 mph |
| 280/65R20 | 34.33" | 11.02" | -1.58% | 61 mph |
One size wider or narrower
Same height on a different wheel size
- 325/75R15 15" (-1.98%)
- 285/85R16 16" (+0.54%)
- 315/75R16 16" (-0.8%)
- 295/80R16 16" (-0.86%)
- 325/75R16 16" (+0.89%)
- 375/65R16 16" (+0.89%)
- 305/80R16 16" (+0.95%)
- 275/85R16 16" (-1.35%)
- 325/70R17 17" (+0.09%)
- 285/80R17 17" (+0.2%)
Questions about 315/60R20
How tall is a 315/60R20 tire in inches?
A 315/60R20 tire is 34.88 inches (886 mm) tall: the 20-inch rim plus two sidewalls of 7.44 inches each.
Is 315/60R20 a 35 inch tire?
Yes. At 34.88 inches tall it is commonly called a 35-inch tire.
How many revolutions per mile does a 315/60R20 make?
About 578 revolutions per mile, based on a calculated circumference of 109.6 inches.
What size can replace 315/60R20?
290/65R20 is the closest match on a 20" rim (-0.11% height). Check load index, speed rating and clearance first.
Compare 315/60R20 against any other size with the tire size calculator.