245/75R17 vs 265/70R17
265/70R17 is 0.14 inches taller than 245/75R17 and 20 mm (0.8 in) wider.
+0.4% height. Inside the usual 3% rule for a swap.
| Measurement | 245/75R17 | 265/70R17 | Difference |
|---|---|---|---|
| Overall height | 31.5 in | 31.6 in | +0.14 in (+0.4%) |
| Section width | 9.6 in | 10.4 in | +0.79 in (+20 mm) |
| Sidewall height | 7.2 in | 7.3 in | +0.07 in |
| Circumference | 98.9 in | 99.3 in | +0.4 in |
| Revolutions per mile | 641 | 638 | −3 |
| Ride height | +0.07 in |
Speedometer
With 265/70R17 fitted, a speedometer set up for 245/75R17 shows the first number when you are really doing the second.
- 3030.1 mph
- 4545.2 mph
- 6060.3 mph
- 7575.3 mph
The two sizes
245/75R17 is 31.5 inches tall with a 7.2-inch sidewall. 265/70R17 is 31.6 inches tall with a 7.3-inch sidewall. A taller sidewall rides softer and gives more ground clearance; a shorter one turns in more sharply. Try other pairs in the tire size calculator.
More comparisons
Questions
Which is bigger, 245/75R17 or 265/70R17?
265/70R17 is taller: 31.6 inches against 31.5. 265/70R17 is wider, at 265 mm.
Can I replace 245/75R17 with 265/70R17?
On height, yes: the difference is 0.4%, inside the usual 3% rule. Check that the extra width clears the suspension and suits your rim width.
How much does the speedometer change?
With 265/70R17 on a vehicle set up for 245/75R17, the speedometer shows 60 mph at a true 60.3 mph, and 70 at 70.3.