245/70R17 vs 265/70R17
265/70R17 is 1.10 inches taller than 245/70R17 and 20 mm (0.8 in) wider.
+3.6% height. Outside the usual 3% rule: the speedometer and ride height change noticeably.
| Measurement | 245/70R17 | 265/70R17 | Difference |
|---|---|---|---|
| Overall height | 30.5 in | 31.6 in | +1.10 in (+3.6%) |
| Section width | 9.6 in | 10.4 in | +0.79 in (+20 mm) |
| Sidewall height | 6.8 in | 7.3 in | +0.55 in |
| Circumference | 95.8 in | 99.3 in | +3.5 in |
| Revolutions per mile | 661 | 638 | −23 |
| Ride height | +0.55 in |
Speedometer
With 265/70R17 fitted, a speedometer set up for 245/70R17 shows the first number when you are really doing the second.
- 3031.1 mph
- 4546.6 mph
- 6062.2 mph
- 7577.7 mph
The two sizes
245/70R17 is 30.5 inches tall with a 6.8-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, 245/70R17 or 265/70R17?
265/70R17 is taller: 31.6 inches against 30.5. 265/70R17 is wider, at 265 mm.
Can I replace 245/70R17 with 265/70R17?
It is 3.6% taller, outside the usual 3% rule, so expect a noticeable speedometer change and check for rubbing at full lock and full suspension travel.
How much does the speedometer change?
With 265/70R17 on a vehicle set up for 245/70R17, the speedometer shows 60 mph at a true 62.2 mph, and 70 at 72.5.