245/75R16 vs 265/75R16
265/75R16 is 1.2 inches taller and 0.8 inches wider. When your speedometer says 60 mph, you'd really be doing 62.3.
I have 245/75R16
I'm looking at 265/75R16
Possible, with caveats
1.2 in taller. At 60 mph on the speedometer you'd really be doing 62.3.
- More than 3% taller. Expect a noticeable speedometer error, and check that it clears the fenders and suspension when turning. Trucks often need a leveling kit.
- 20 mm wider. Check it clears the suspension inside and the fender outside, and that your wheels are wide enough.
245/75R16 now 265/75R16 newTo scale
At an indicated 60 mph you're really doing 62.3 mph
+1.18″
Height
+0.79″
Width
+0.59″
Sidewall
All measurements
| 245/75R16 | 265/75R16 | Change | |
|---|---|---|---|
| Overall height | 30.47″ | 31.65″ | +1.18″ |
| Section width | 9.65″ | 10.43″ | +0.79″ |
| Sidewall height | 7.23″ | 7.82″ | +0.59″ |
| Wheel size | 16″ | 16″ | same |
| Distance per turn | 95.72″ | 99.43″ | +3.71″ |
| Turns per mile | 662 | 637 | −25 |
Speedometer after switching
Your speedometer is calibrated for 245/75R16. On 265/75R16:
| Speedometer says | You're really doing |
|---|---|
| 25 mph | 26.0 mph |
| 35 mph | 36.4 mph |
| 45 mph | 46.7 mph |
| 55 mph | 57.1 mph |
| 65 mph | 67.5 mph |
| 75 mph | 77.9 mph |
What changes on the vehicle
- Ride height goes up about 0.59″ (half the height difference).
- The tire turns 25 fewer times per mile, so your odometer will read low by about 3.9%.
- The sidewall is 0.59″ taller, on the same wheels.