205/45R17 vs 225/45R17
225/45R17 is taller than 205/45R17 by 2.92% — a diameter difference of 0.71″.
What changes between 205/45R17 and 225/45R17
Switching from 205/45R17 to 225/45R17 changes overall diameter by +2.92%, a taller tire by 0.71 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 +0.79″ (205mm → 225mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.36″: a taller sidewall softens ride quality and adds off-road bump protection, with some loss of steering crispness. Revs per mile moves by -23, which translates directly to speedometer error — at an indicated 65 mph, actual speed becomes 66.9 mph. Both sizes share the same 17″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 205/45R17 | 225/45R17 |
|---|---|---|
| Overall diameter | 24.26″ | 24.97″ |
| Section width | 8.07″ (205 mm) | 8.86″ (225 mm) |
| Sidewall height | 3.63″ (45%) | 3.99″ (45%) |
| Rim diameter | 17″ | 17″ |
| Circumference | 76.23″ | 78.45″ |
| Revs per mile | 831 | 808 |
Interactive comparison
275/65R18 or "33" for inch aliases205/45R17
- Diameter
- 24.26″ / 616.3mm
- Section Width
- 8.07″
- Sidewall
- 3.63″ / 92.25mm
- Circumference
- 76.23″
- Revs/Mile
- 831
225/45R17
- Diameter
- 24.97″ / 634.3mm
- Section Width
- 8.86″
- Sidewall
- 3.99″ / 101.25mm
- Circumference
- 78.45″
- Revs/Mile
- 808
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 61.75 mph (99.38 km/h). Your speedometer reads 2.92% low versus actual speed.