255/70R15 tire size in inches
A 255/70R15 tire measures
29.1" tall × 10.0" wide
7.03" sidewall on a 15" wheel. 694 revolutions per mile.
255/70R15 means a tire 255 mm wide, with sidewalls 70% as tall as the tire is wide (179 mm), radial construction (R), for a 15 inch wheel.
255/70R15 specs
| Overall diameter (height) | 29.06 inches (738 mm) |
|---|---|
| Section width | 10.04 inches (255 mm) |
| Sidewall height | 7.03 inches (179 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 91.3 inches (2,318 mm) |
| Revolutions per mile | 694 |
| Revolutions per kilometer | 431 |
| Approximate rim width | 7.0" to 8.5" |
| In inches (flotation style) | 29.1x10.0R15 |
| Aspect ratio | 70% |
Calculated from the size. Real tires differ by brand, model and tread depth, typically by a few tenths of an inch.
Sizes that can replace 255/70R15 on a 15" wheel
These 15" sizes are within 3% of 255/70R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 275/65R15 | 29.07" | 10.83" | +0.1% | 60.0 mph | Compare |
| 225/80R15 | 29.17" | 8.86" | +0.4% | 60.2 mph | Compare |
| 235/75R15 | 28.88" | 9.25" | −0.6% | 59.6 mph | Compare |
| 215/85R15 | 29.39" | 8.46" | +1.2% | 60.7 mph | Compare |
| 205/85R15 | 28.72" | 8.07" | −1.2% | 59.3 mph | Compare |
| 245/75R15 | 29.47" | 9.65" | +1.4% | 60.9 mph | Compare |
| 265/65R15 | 28.56" | 10.43" | −1.7% | 59.0 mph | Compare |
| 215/80R15 | 28.54" | 8.46" | −1.8% | 58.9 mph | Compare |
| 285/65R15 | 29.59" | 11.22" | +1.8% | 61.1 mph | Compare |
| 265/70R15 | 29.61" | 10.43" | +1.9% | 61.1 mph | Compare |
| 245/70R15 | 28.50" | 9.65" | −1.9% | 58.9 mph | Compare |
| 285/60R15 | 28.46" | 11.22" | −2.0% | 58.8 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 195/85R16 | 16" | 29.05" | 0.0% | Compare |
| 225/85R14 | 14" | 29.06" | 0.0% | Compare |
| 255/75R14 | 14" | 29.06" | 0.0% | Compare |
| 255/65R16 | 16" | 29.05" | 0.0% | Compare |
| 255/60R17 | 17" | 29.05" | 0.0% | Compare |
| 255/55R18 | 18" | 29.04" | 0.0% | Compare |
| 255/50R19 | 19" | 29.04" | −0.1% | Compare |
| 255/45R20 | 20" | 29.04" | −0.1% | Compare |
| 255/40R21 | 21" | 29.03" | −0.1% | Compare |
| 235/65R17 | 17" | 29.03" | −0.1% | Compare |
| 255/35R22 | 22" | 29.03" | −0.1% | Compare |
| 255/25R24 | 24" | 29.02" | −0.1% | Compare |
One size up or down
- 245/70R15narrower: 28.5" × 9.6"
- 265/70R15wider: 29.6" × 10.4"
- 255/65R15lower profile: 28.1" × 10.0"
- 255/75R15taller sidewall: 30.1" × 10.0"
Compare 255/70R15 with another size
Questions
- How tall is a 255/70R15 tire?
- A 255/70R15 tire is 29.1 inches tall (738 mm), calculated from the size. It is 10.0 inches wide with 7.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 255/70R15 mean?
- 255/70R15 means a tire 255 mm wide, with sidewalls 70% as tall as the tire is wide (179 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 255/70R15 tire make?
- About 694 revolutions per mile, based on a circumference of 91.3 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 255/70R15 tire?
- Roughly 7.0" to 8.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 275/65R15 instead of 255/70R15?
- 275/65R15 is +0.02 inches (+0.1%) in overall diameter, so at an indicated 60 mph you would be doing 60.0 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.