225/65R17 vs 235/65R17
235/65R17 is 0.5 inches taller and 0.4 inches wider. When your speedometer says 60 mph, you'd really be doing 61.1.
I have 225/65R17
I'm looking at 235/65R17
Close match
0.5 in taller. At 60 mph on the speedometer you'd really be doing 61.1.
- Within the 3% height difference most tire shops consider safe.
225/65R17 now 235/65R17 newTo scale
At an indicated 60 mph you're really doing 61.1 mph
+0.51″
Height
+0.39″
Width
+0.26″
Sidewall
All measurements
| 225/65R17 | 235/65R17 | Change | |
|---|---|---|---|
| Overall height | 28.52″ | 29.03″ | +0.51″ |
| Section width | 8.86″ | 9.25″ | +0.39″ |
| Sidewall height | 5.76″ | 6.01″ | +0.26″ |
| Wheel size | 17″ | 17″ | same |
| Distance per turn | 89.58″ | 91.19″ | +1.61″ |
| Turns per mile | 707 | 695 | −12 |
Speedometer after switching
Your speedometer is calibrated for 225/65R17. On 235/65R17:
| Speedometer says | You're really doing |
|---|---|
| 25 mph | 25.4 mph |
| 35 mph | 35.6 mph |
| 45 mph | 45.8 mph |
| 55 mph | 56.0 mph |
| 65 mph | 66.2 mph |
| 75 mph | 76.3 mph |
What changes on the vehicle
- Ride height goes up about 0.26″ (half the height difference).
- The tire turns 12 fewer times per mile, so your odometer will read low by about 1.8%.
- The sidewall is 0.26″ taller, on the same wheels.