The new tire changes overall diameter by -1.95%. With a speedometer calibrated to the original tire, that same percentage is how far the speedometer and odometer read off — a taller tire means your true speed is higher than indicated and the odometer under-counts distance.
| Speedo shows | True speed | Speedo shows | True speed |
|---|---|---|---|
| 40 km/h | 39.2 km/h | 25 mph | 24 mph |
| 60 km/h | 58.8 km/h | 37 mph | 37 mph |
| 80 km/h | 78.4 km/h | 50 mph | 49 mph |
| 100 km/h | 98 km/h | 62 mph | 61 mph |
| 120 km/h | 117.7 km/h | 75 mph | 73 mph |
Commonly compared with 215/70R15
- 215/70R15 vs 215/65R16 · 215/65R16 specs
- 215/70R15 vs 225/60R16 · 225/60R16 specs
- 215/70R15 vs 235/60R16 · 235/60R16 specs
- 215/70R15 vs 205/70R15 · 205/70R15 specs
- 215/70R15 vs 225/70R15 · 225/70R15 specs
- 215/70R15 vs 215/60R16 · 215/60R16 specs
- 215/70R15 vs 205/60R16 · 205/60R16 specs
- 215/70R15 vs 205/65R15 · 205/65R15 specs
FAQ
What is the overall diameter of a 215/70R15 tire?
A 215/70R15 tire has an overall diameter of about 26.85 inches (682 mm) and a section width of 215 mm.
What sizes can replace a 215/70R15 tire?
Sizes within about ±3% of 215/70R15's 26.9-inch diameter are the closest matches, such as 215/65R16, 225/60R16, 235/60R16. Use the calculator above to check the exact speedometer effect of any substitute.
Fitment & trouble codes
Changing tire size by more than about 3% shifts the speedometer, odometer and, on some vehicles, ABS/traction calibration — which can set wheel-speed-sensor or vehicle-speed codes. See C1234 (wheel speed sensor) and C0050 (rear wheel speed) if a warning light appears after a size change.