255/60R20 tire size
255/60R20 is a metric size: 32.0" tall, 10.0" wide, on a 20" rim — about a 32x10.00R20. The sidewall is 6.0" and the tire turns 629 times per mile.
255/60R20 specs
| Overall diameter (height) | 32.05" · 814 mm |
|---|---|
| Section width | 10.04" · 255 mm |
| Sidewall height | 6.02" · 153 mm (60% of width) |
| Rim diameter | 20" |
| Circumference | 100.68" · 2.557 m |
| Revolutions per mile | 629 (391 per km) |
| Inch (flotation) equivalent | 32x10.00R20 |
Equivalent sizes on a 20" rim
Sizes within ±5% of the overall diameter. Green rows are inside the usual ±3% limit for keeping the speedometer, ABS and gearing right; red rows are bigger changes that need clearance checks.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 275/55R20 common | 31.91" | -0.43% | +20 mm | 59.7 mph | compare → |
| 275/60R20 common | 32.99" | +2.95% | +20 mm | 61.8 mph | compare → |
| 255/55R20 common | 31.04" | -3.13% | 0 mm | 58.1 mph | compare → |
| 265/60R20 common | 32.52" | +1.47% | +10 mm | 60.9 mph | compare → |
| 305/55R20 common | 33.21" | +3.62% | +50 mm | 62.2 mph | compare → |
| 285/55R20 common | 32.34" | +0.92% | +30 mm | 60.6 mph | compare → |
| 285/60R20 common | 33.46" | +4.42% | +30 mm | 62.7 mph | compare → |
| 275/50R20 common | 30.83" | -3.81% | +20 mm | 57.7 mph | compare → |
| 33x12.50R20 common | 33.00" | +2.97% | +63 mm | 61.8 mph | compare → |
| 295/55R20 | 32.78" | +2.27% | +40 mm | 61.4 mph | compare → |
| 285/50R20 | 31.22" | -2.58% | +30 mm | 58.5 mph | compare → |
| 245/60R20 | 31.57" | -1.47% | -10 mm | 59.1 mph | compare → |
| 305/50R20 | 32.01" | -0.12% | +50 mm | 59.9 mph | compare → |
| 295/45R20 | 30.45" | -4.98% | +40 mm | 57.0 mph | compare → |
| 235/60R20 | 31.10" | -2.95% | -20 mm | 58.2 mph | calculate → |
| 33x13.50R20 | 33.00" | +2.97% | +88 mm | 61.8 mph | calculate → |
| 33x11.50R20 | 33.00" | +2.97% | +37 mm | 61.8 mph | calculate → |
| 265/55R20 | 31.48" | -1.78% | +10 mm | 58.9 mph | calculate → |
| 325/50R20 | 32.80" | +2.33% | +70 mm | 61.4 mph | calculate → |
| 33x12.00R20 | 33.00" | +2.97% | +50 mm | 61.8 mph | calculate → |
| 33x22.00R20 | 33.00" | +2.97% | +304 mm | 61.8 mph | calculate → |
| 31x18.00R20 | 31.00" | -3.27% | +202 mm | 58.0 mph | calculate → |
| 375/45R20 | 33.29" | +3.87% | +120 mm | 62.3 mph | calculate → |
| 305/45R20 | 30.81" | -3.87% | +50 mm | 57.7 mph | calculate → |
| 315/50R20 | 32.40" | +1.11% | +60 mm | 60.7 mph | calculate → |
| 295/50R20 | 31.61" | -1.35% | +40 mm | 59.2 mph | calculate → |
| 33x14.50R20 | 33.00" | +2.97% | +113 mm | 61.8 mph | calculate → |
Plus / minus sizing: 19" and 21" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 275/50R21 | 31.83" | -0.69% | +20 mm | 59.6 mph | compare → |
| 255/65R19 | 32.05" | +0.01% | 0 mm | 60.0 mph | calculate → |
| 315/45R21 | 32.16" | +0.36% | +60 mm | 60.2 mph | calculate → |
Try another size against 255/60R20
Questions
What size is 255/60R20 in inches?
255/60R20 is about 32.0" tall and 10.0" wide on a 20-inch rim — roughly a 32x10.00R20 in inch sizing.
What does 255/60R20 mean?
255 mm section width, sidewall 60% of the width (6.02"), radial construction, 20-inch rim.
What tire sizes are equivalent to 255/60R20?
On the same 20" rim, within 3% of the diameter: 305/50R20 (-0.12%), 275/55R20 (-0.43%), 285/55R20 (+0.92%), 315/50R20 (+1.11%), 295/50R20 (-1.35%), 265/60R20 (+1.47%).
How many revolutions per mile does a 255/60R20 tire make?
About 629 revolutions per mile (circumference 100.7").
How these numbers are computed
Diameter = rim + 2 × sidewall, sidewall = width × aspect ÷ 100, circumference = π × diameter, revolutions per mile = 63,360 ÷ circumference. Real tires differ by brand by a few tenths of an inch. Last reviewed October 14, 2026.