255/75R17 tire size
255/75R17 is a metric size: 32.1" tall, 10.0" wide, on a 17" rim — about a 32x10.00R17. The sidewall is 7.5" and the tire turns 629 times per mile.
255/75R17 specs
| Overall diameter (height) | 32.06" · 814 mm |
|---|---|
| Section width | 10.04" · 255 mm |
| Sidewall height | 7.53" · 191 mm (75% of width) |
| Rim diameter | 17" |
| Circumference | 100.72" · 2.558 m |
| Revolutions per mile | 629 (391 per km) |
| Inch (flotation) equivalent | 32x10.00R17 |
Equivalent sizes on a 17" 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 | |
|---|---|---|---|---|---|
| 265/70R17 common | 31.61" | -1.41% | +10 mm | 59.2 mph | compare → |
| 245/70R17 common | 30.50" | -4.85% | -10 mm | 57.1 mph | compare → |
| 285/70R17 common | 32.71" | +2.03% | +30 mm | 61.2 mph | compare → |
| 245/75R17 common | 31.47" | -1.84% | -10 mm | 58.9 mph | compare → |
| 265/65R17 common | 30.56" | -4.67% | +10 mm | 57.2 mph | compare → |
| 235/80R17 common | 31.80" | -0.80% | -20 mm | 59.5 mph | compare → |
| 255/70R17 common | 31.06" | -3.13% | 0 mm | 58.1 mph | compare → |
| 295/70R17 | 33.26" | +3.75% | +40 mm | 62.2 mph | compare → |
| 235/75R17 | 30.88" | -3.68% | -20 mm | 57.8 mph | compare → |
| 33x12.50R17 | 33.00" | +2.94% | +63 mm | 61.8 mph | compare → |
| 275/70R17 | 32.16" | +0.31% | +20 mm | 60.2 mph | compare → |
| 255/80R17 | 33.06" | +3.13% | 0 mm | 61.9 mph | compare → |
| 305/65R17 | 32.61" | +1.72% | +50 mm | 61.0 mph | compare → |
| 275/65R17 | 31.07" | -3.07% | +20 mm | 58.2 mph | calculate → |
| 285/65R17 | 31.59" | -1.47% | +30 mm | 59.1 mph | calculate → |
| 32x11.50R17 | 32.00" | -0.18% | +37 mm | 59.9 mph | calculate → |
| 315/60R17 | 31.88" | -0.55% | +60 mm | 59.7 mph | calculate → |
| 33x10.50R17 | 33.00" | +2.94% | +12 mm | 61.8 mph | calculate → |
| 33x11.50R17 | 33.00" | +2.94% | +37 mm | 61.8 mph | calculate → |
| 33x13.50R17 | 33.00" | +2.94% | +88 mm | 61.8 mph | calculate → |
| 33x13.00R17 | 33.00" | +2.94% | +75 mm | 61.8 mph | calculate → |
| 33x9.50R17 | 33.00" | +2.94% | -14 mm | 61.8 mph | calculate → |
| 31x10.50R17 | 31.00" | -3.30% | +12 mm | 58.0 mph | calculate → |
| 315/55R17 | 30.64" | -4.42% | +60 mm | 57.3 mph | calculate → |
| 32x10.50R17 | 32.00" | -0.18% | +12 mm | 59.9 mph | calculate → |
| 235/85R17 | 32.73" | +2.09% | -20 mm | 61.3 mph | calculate → |
| 285/60R17 | 30.46" | -4.97% | +30 mm | 57.0 mph | calculate → |
Plus / minus sizing: 16" and 18" rims
Same overall height on a different rim. Check wheel width and clearance before switching.
| Size | Diameter | Difference | Width | Speedo at 60 | |
|---|---|---|---|---|---|
| 275/65R18 common | 32.07" | +0.05% | +20 mm | 60.0 mph | compare → |
| 255/70R18 common | 32.06" | -0.01% | 0 mm | 60.0 mph | compare → |
| 32x11.50R16 | 32.00" | -0.18% | +37 mm | 59.9 mph | calculate → |
| 32x10.00R16 | 32.00" | -0.18% | -1 mm | 59.9 mph | calculate → |
| 32x9.00R16 | 32.00" | -0.18% | -26 mm | 59.9 mph | calculate → |
| 225/90R16 | 31.94" | -0.36% | -30 mm | 59.8 mph | calculate → |
Try another size against 255/75R17
Questions
What size is 255/75R17 in inches?
255/75R17 is about 32.1" tall and 10.0" wide on a 17-inch rim — roughly a 32x10.00R17 in inch sizing.
What does 255/75R17 mean?
255 mm section width, sidewall 75% of the width (7.53"), radial construction, 17-inch rim.
What tire sizes are equivalent to 255/75R17?
On the same 17" rim, within 3% of the diameter: 32x10.50R17 (-0.18%), 32x11.50R17 (-0.18%), 275/70R17 (+0.31%), 315/60R17 (-0.55%), 235/80R17 (-0.80%), 265/70R17 (-1.41%).
How many revolutions per mile does a 255/75R17 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.