215/70R16 vs 225/70R16
225/70R16 is taller than 215/70R16 by 1.98% — a diameter difference of 0.55″.
What changes between 215/70R16 and 225/70R16
Switching from 215/70R16 to 225/70R16 changes overall diameter by +1.98%, a taller tire by 0.55 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 +0.40″ (215mm → 225mm), which affects contact patch and fender-well clearance. Sidewall height shifts by +0.27″: a taller sidewall softens ride quality and adds off-road bump protection, with some loss of steering crispness. Revs per mile moves by -14, which translates directly to speedometer error — at an indicated 65 mph, actual speed becomes 66.3 mph. Both sizes share the same 16″ rim, so no wheel change is required — this is a pure tire-only swap.
| Spec | 215/70R16 | 225/70R16 |
|---|---|---|
| Overall diameter | 27.85″ | 28.4″ |
| Section width | 8.46″ (215 mm) | 8.86″ (225 mm) |
| Sidewall height | 5.93″ (70%) | 6.2″ (70%) |
| Rim diameter | 16″ | 16″ |
| Circumference | 87.49″ | 89.23″ |
| Revs per mile | 724 | 710 |
Interactive comparison
275/65R18 or "33" for inch aliases215/70R16
- Diameter
- 27.85″ / 707.4mm
- Section Width
- 8.46″
- Sidewall
- 5.93″ / 150.5mm
- Circumference
- 87.49″
- Revs/Mile
- 724
225/70R16
- Diameter
- 28.4″ / 721.4mm
- Section Width
- 8.86″
- Sidewall
- 6.2″ / 157.5mm
- Circumference
- 89.23″
- Revs/Mile
- 710
Speedometer & Diameter Impact
At an indicated 60 mph, your actual speed is 61.19 mph (98.47 km/h). Your speedometer reads 1.98% low versus actual speed.