31x10.50R15 tire size in inches
A 31x10.50R15 tire measures
31.0" tall × 10.5" wide
8.00" sidewall on a 15" wheel. 651 revolutions per mile.
31x10.50R15 is a flotation (inch) size: 31 inches tall, 10.50 inches wide, for a 15 inch wheel. The R means radial construction.
31x10.50R15 specs
| Overall diameter (height) | 31.00 inches (787 mm) |
|---|---|
| Section width | 10.50 inches (267 mm) |
| Sidewall height | 8.00 inches (203 mm) |
| Wheel (rim) diameter | 15 inches |
| Circumference | 97.4 inches (2,474 mm) |
| Revolutions per mile | 651 |
| Revolutions per kilometer | 404 |
| Approximate rim width | 7.0" to 9.5" |
| Aspect ratio (equivalent) | 76% |
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 31x10.50R15 on a 15" wheel
These 15" sizes are within 3% of 31x10.50R15's overall diameter, the range most tire shops treat as interchangeable.
| Size | Diameter | Width | Difference | Real speed at 60 | |
|---|---|---|---|---|---|
| 255/80R15 | 31.06" | 10.04" | +0.2% | 60.1 mph | Compare |
| 275/75R15 | 31.24" | 10.83" | +0.8% | 60.5 mph | Compare |
| 235/85R15 | 30.73" | 9.25" | −0.9% | 59.5 mph | Compare |
| 285/70R15 | 30.71" | 11.22" | −0.9% | 59.4 mph | Compare |
| 265/75R15 | 30.65" | 10.43" | −1.1% | 59.3 mph | Compare |
| 245/85R15 | 31.40" | 9.65" | +1.3% | 60.8 mph | Compare |
| 245/80R15 | 30.43" | 9.65" | −1.8% | 58.9 mph | Compare |
| 265/80R15 | 31.69" | 10.43" | +2.2% | 61.3 mph | Compare |
| 285/75R15 | 31.83" | 11.22" | +2.7% | 61.6 mph | Compare |
| 275/70R15 | 30.16" | 10.83" | −2.7% | 58.4 mph | Compare |
Same height on other wheel sizes (plus and minus sizing)
| Size | Wheel | Diameter | Difference | |
|---|---|---|---|---|
| 215/65R20 | 20" | 31.00" | 0.0% | Compare |
| 275/60R18 | 18" | 30.99" | 0.0% | Compare |
| 305/50R19 | 19" | 31.01" | 0.0% | Compare |
| 355/25R24 | 24" | 30.99" | 0.0% | Compare |
| 285/40R22 | 22" | 30.98" | −0.1% | Compare |
| 235/65R19 | 19" | 31.03" | +0.1% | Compare |
| 255/35R24 | 24" | 31.03" | +0.1% | Compare |
| 295/30R24 | 24" | 30.97" | −0.1% | Compare |
| 255/45R22 | 22" | 31.04" | +0.1% | Compare |
| 255/50R21 | 21" | 31.04" | +0.1% | Compare |
| 325/35R22 | 22" | 30.96" | −0.1% | Compare |
| 255/55R20 | 20" | 31.04" | +0.1% | Compare |
Compare 31x10.50R15 with another size
Questions
- How tall is a 31x10.50R15 tire?
- A 31x10.50R15 tire is 31.0 inches tall (787 mm), calculated from the size. It is 10.5 inches wide with 8.0 inches sidewalls. Real tires vary by a few tenths of an inch between brands and tread patterns.
- What does 31x10.50R15 mean?
- 31x10.50R15 is a flotation (inch) size: 31 inches tall, 10.50 inches wide, for a 15 inch wheel. The R means radial construction.
- How many revolutions per mile does a 31x10.50R15 tire make?
- About 651 revolutions per mile, based on a circumference of 97.4 inches. Under load the tire flattens slightly, so the maker's published figure is usually a little higher.
- What rim width fits a 31x10.50R15 tire?
- Roughly 7.0" to 9.5". Check the tire maker's approved rim range for the exact model before buying wheels.
- Can I use 255/80R15 instead of 31x10.50R15?
- 255/80R15 is +0.06 inches (+0.2%) in overall diameter, so at an indicated 60 mph you would be doing 60.1 mph. Differences under 3% are usually fine, but check clearance, load index and your vehicle's placard.