-2.34%Safe swap — speedometer error is minor
Speedometer error
With a speedometer calibrated to 205/70R15, fitting 205/60R16 makes it read as follows:
| Speedo shows | True speed | Speedo shows | True speed |
|---|---|---|---|
| 40 km/h | 39.1 km/h | 25 mph | 24 mph |
| 60 km/h | 58.6 km/h | 37 mph | 36 mph |
| 80 km/h | 78.1 km/h | 50 mph | 49 mph |
| 100 km/h | 97.7 km/h | 62 mph | 61 mph |
| 120 km/h | 117.2 km/h | 75 mph | 73 mph |
Full comparison
205/70R15
Overall diameter668.0 mm · 26.30 in
Section width205 mm · 8.07 in
Sidewall height143.5 mm · 5.65 in
Circumference2098.6 mm · 82.6 in
Revolutions per mile767
Revolutions per km477
205/60R16
Overall diameter652.4 mm · 25.69 in
Section width205 mm · 8.07 in
Sidewall height123.0 mm · 4.84 in
Circumference2049.6 mm · 80.7 in
Revolutions per mile785
Revolutions per km488
-2.34%Safe swap — speedometer error is minor
Original
Overall diameter668 mm · 26.3 in
Sidewall height143.5 mm
Circumference2,098.6 mm
Revolutions / mile766.9
New
Overall diameter652.4 mm · 25.69 in
Sidewall height123 mm
Circumference2,049.6 mm
Revolutions / mile785.2
Speedometer & odometer error
The new tire changes overall diameter by -2.34%. 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 | 39.1 km/h | 25 mph | 24 mph |
| 60 km/h | 58.6 km/h | 37 mph | 36 mph |
| 80 km/h | 78.1 km/h | 50 mph | 49 mph |
| 100 km/h | 97.7 km/h | 62 mph | 61 mph |
| 120 km/h | 117.2 km/h | 75 mph | 73 mph |
See individual specs: 205/70R15 · 205/60R16. A change this size can affect ABS/speed calibration — see wheel-speed codes if a light appears.