225/65R17 vs 235/65R17
235/65R17 is taller than 225/65R17 by 1.79% — a diameter difference of 0.51″.
What changes between 225/65R17 and 235/65R17
Switching from 225/65R17 to 235/65R17 changes overall diameter by +1.79%, a taller tire by 0.51 inches. This lands inside the ±3% fitment safe zone, so most vehicles will accept the swap without rubbing, speedometer recalibration, or ABS/TPMS complications. Section width moves by +0.39″ (225mm → 235mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.25″: a taller sidewall softens ride quality and adds off-road bump protection, with some loss of steering crispness. Revs per mile moves by -12, which translates directly to speedometer error — at an indicated 65 mph, actual speed becomes 66.2 mph. Both sizes share the same 17″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 225/65R17 | 235/65R17 |
|---|---|---|
| Overall diameter | 28.52″ | 29.03″ |
| Section width | 8.86″ (225 mm) | 9.25″ (235 mm) |
| Sidewall height | 5.76″ (65%) | 6.01″ (65%) |
| Rim diameter | 17″ | 17″ |
| Circumference | 89.58″ | 91.19″ |
| Revs per mile | 707 | 695 |
Interactive comparison
275/65R18 or "33" for inch aliases225/65R17
- Diameter
- 28.52″ / 724.3mm
- Section Width
- 8.86″
- Sidewall
- 5.76″ / 146.25mm
- Circumference
- 89.58″
- Revs/Mile
- 707
235/65R17
- Diameter
- 29.03″ / 737.3mm
- Section Width
- 9.25″
- Sidewall
- 6.01″ / 152.75mm
- Circumference
- 91.19″
- Revs/Mile
- 695
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 61.08 mph (98.29 km/h). Your speedometer reads 1.79% low versus actual speed.