31x10.50R15 is 0.4" taller than 265/75R15 (1.1%)
| 265/75R15 | 31x10.50R15 | Difference | |
|---|---|---|---|
| Overall diameter | 30.65" | 31.00" | +0.35" |
| Section width | 10.43" | 10.50" | +0.07" |
| Sidewall height | 7.82" | 8.00" | +0.18" |
| Circumference | 96.3" | 97.4" | +1.1" |
| Revolutions per mile | 658 | 651 | −7 |
| Wheel diameter | 15" | 15" | ±0" |
| Shows | Actual | Diff |
|---|---|---|
| 30 mph | 30.3 mph | +0.3 |
| 45 mph | 45.5 mph | +0.5 |
| 60 mph | 60.7 mph | +0.7 |
| 70 mph | 70.8 mph | +0.8 |
| 80 mph | 80.9 mph | +0.9 |
| Current | Equivalent |
|---|---|
| 3.42 | 3.46 |
| 3.55 | 3.59 |
| 3.73 | 3.77 |
| 4.10 | 4.15 |
31x10.50R15 is 0.35" taller than 265/75R15, a +1.14% change in diameter, inside the 3% range most shops treat as a safe swap.
Ground clearance changes by 0.18" (half the diameter change), and the tire needs 0.18" more room above it.
Both tires are almost the same width (0.07" apart).
Both fit a 15" wheel; the sidewall is 0.18" taller on 31x10.50R15.
Details: 265/75R15 in inches · 31x10.50R15 in inches · change sizes in the calculator
31x10.50R15 is 0.35" taller (+1.14%) and 0.07" wider than 265/75R15.
Yes, by +1.14%. When the speedometer shows 60 mph you would be going 60.7 mph.
Often yes: the diameter change of +1.1% is within the common 3% guideline. Check the load index, speed rating and clearance.