265/70R17 vs 285/70R17
285/70R17 is 1.10 inches taller than 265/70R17 and 20 mm (0.8 in) wider.
+3.5% height. Outside the usual 3% rule: the speedometer and ride height change noticeably.
| Measurement | 265/70R17 | 285/70R17 | Difference |
|---|---|---|---|
| Overall height | 31.6 in | 32.7 in | +1.10 in (+3.5%) |
| Section width | 10.4 in | 11.2 in | +0.79 in (+20 mm) |
| Sidewall height | 7.3 in | 7.9 in | +0.55 in |
| Circumference | 99.3 in | 102.8 in | +3.5 in |
| Revolutions per mile | 638 | 617 | −22 |
| Ride height | +0.55 in |
Speedometer
With 285/70R17 fitted, a speedometer set up for 265/70R17 shows the first number when you are really doing the second.
- 3031.0 mph
- 4546.6 mph
- 6062.1 mph
- 7577.6 mph
The two sizes
265/70R17 is 31.6 inches tall with a 7.3-inch sidewall. 285/70R17 is 32.7 inches tall with a 7.9-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, 265/70R17 or 285/70R17?
285/70R17 is taller: 32.7 inches against 31.6. 285/70R17 is wider, at 285 mm.
Can I replace 265/70R17 with 285/70R17?
It is 3.5% 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 285/70R17 on a vehicle set up for 265/70R17, the speedometer shows 60 mph at a true 62.1 mph, and 70 at 72.4.