-2.82%Safe swap — speedometer error is minor
Speedometer error
With a speedometer calibrated to 225/70R15, fitting 225/60R16 makes it read as follows:
| Speedo shows | True speed | Speedo shows | True speed |
|---|---|---|---|
| 40 km/h | 38.9 km/h | 25 mph | 24 mph |
| 60 km/h | 58.3 km/h | 37 mph | 36 mph |
| 80 km/h | 77.7 km/h | 50 mph | 48 mph |
| 100 km/h | 97.2 km/h | 62 mph | 60 mph |
| 120 km/h | 116.6 km/h | 75 mph | 72 mph |
Full comparison
225/70R15
Overall diameter696.0 mm · 27.40 in
Section width225 mm · 8.86 in
Sidewall height157.5 mm · 6.20 in
Circumference2186.5 mm · 86.1 in
Revolutions per mile736
Revolutions per km457
225/60R16
Overall diameter676.4 mm · 26.63 in
Section width225 mm · 8.86 in
Sidewall height135.0 mm · 5.31 in
Circumference2125.0 mm · 83.7 in
Revolutions per mile757
Revolutions per km471
-2.82%Safe swap — speedometer error is minor
Original
Overall diameter696 mm · 27.4 in
Sidewall height157.5 mm
Circumference2,186.5 mm
Revolutions / mile736
New
Overall diameter676.4 mm · 26.63 in
Sidewall height135 mm
Circumference2,125 mm
Revolutions / mile757.3
Speedometer & odometer error
The new tire changes overall diameter by -2.82%. 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 | 38.9 km/h | 25 mph | 24 mph |
| 60 km/h | 58.3 km/h | 37 mph | 36 mph |
| 80 km/h | 77.7 km/h | 50 mph | 48 mph |
| 100 km/h | 97.2 km/h | 62 mph | 60 mph |
| 120 km/h | 116.6 km/h | 75 mph | 72 mph |
See individual specs: 225/70R15 · 225/60R16. A change this size can affect ABS/speed calibration — see wheel-speed codes if a light appears.