255/80R15 tire size in inches
A 255/80R15 tire measures
31.1" tall × 10.0" wide
8.03" sidewall on a 15" wheel. 649 revolutions per mile.
255/80R15 means a tire 255 mm wide, with sidewalls 80% as tall as the tire is wide (204 mm), radial construction (R), for a 15 inch wheel.
255/80R15 specs
| Overall diameter (height) | 31.06 inches (789 mm) |
|---|---|
| Section width | 10.04 inches (255 mm) |
| Sidewall height | 8.03 inches (204 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 97.6 inches (2,479 mm) |
| Revolutions per mile | 649 |
| Revolutions per kilometer | 403 |
| Approximate rim width | 7.0" to 8.5" |
| In inches (flotation style) | 31.1x10.0R15 |
| Aspect ratio | 80% |
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 255/80R15 on a 15" wheel
These 15" sizes are within 3% of 255/80R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 31x10.50R15 | 31.00" | 10.50" | −0.2% | 59.9 mph | Compare |
| 275/75R15 | 31.24" | 10.83" | +0.6% | 60.3 mph | Compare |
| 235/85R15 | 30.73" | 9.25" | −1.1% | 59.4 mph | Compare |
| 245/85R15 | 31.40" | 9.65" | +1.1% | 60.6 mph | Compare |
| 285/70R15 | 30.71" | 11.22" | −1.1% | 59.3 mph | Compare |
| 265/75R15 | 30.65" | 10.43" | −1.3% | 59.2 mph | Compare |
| 245/80R15 | 30.43" | 9.65" | −2.0% | 58.8 mph | Compare |
| 265/80R15 | 31.69" | 10.43" | +2.0% | 61.2 mph | Compare |
| 285/75R15 | 31.83" | 11.22" | +2.5% | 61.5 mph | Compare |
| 275/70R15 | 30.16" | 10.83" | −2.9% | 58.3 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 225/85R16 | 16" | 31.06" | 0.0% | Compare |
| 255/75R16 | 16" | 31.06" | 0.0% | Compare |
| 255/85R14 | 14" | 31.07" | 0.0% | Compare |
| 255/70R17 | 17" | 31.06" | 0.0% | Compare |
| 255/65R18 | 18" | 31.05" | 0.0% | Compare |
| 275/65R17 | 17" | 31.07" | 0.0% | Compare |
| 255/60R19 | 19" | 31.05" | −0.1% | Compare |
| 255/55R20 | 20" | 31.04" | −0.1% | Compare |
| 255/50R21 | 21" | 31.04" | −0.1% | Compare |
| 255/45R22 | 22" | 31.04" | −0.1% | Compare |
| 235/65R19 | 19" | 31.03" | −0.1% | Compare |
| 255/35R24 | 24" | 31.03" | −0.1% | Compare |
One size up or down
- 245/80R15narrower: 30.4" × 9.6"
- 265/80R15wider: 31.7" × 10.4"
- 255/75R15lower profile: 30.1" × 10.0"
- 255/85R15taller sidewall: 32.1" × 10.0"
Compare 255/80R15 with another size
Questions
- How tall is a 255/80R15 tire?
- A 255/80R15 tire is 31.1 inches tall (789 mm), calculated from the size. It is 10.0 inches wide with 8.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 255/80R15 mean?
- 255/80R15 means a tire 255 mm wide, with sidewalls 80% as tall as the tire is wide (204 mm), radial construction (R), for a 15 inch wheel.
- How many revolutions per mile does a 255/80R15 tire make?
- About 649 revolutions per mile, based on a circumference of 97.6 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 255/80R15 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 31x10.50R15 instead of 255/80R15?
- 31x10.50R15 is −0.06 inches (−0.2%) in overall diameter, so at an indicated 60 mph you would be doing 59.9 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.