-4.34%Borderline — noticeable speedometer/odometer error
Speedometer error
With a speedometer calibrated to 215/70R15, fitting 205/60R16 makes it read as follows:
| Speedo shows | True speed | Speedo shows | True speed |
|---|---|---|---|
| 40 km/h | 38.3 km/h | 25 mph | 24 mph |
| 60 km/h | 57.4 km/h | 37 mph | 36 mph |
| 80 km/h | 76.5 km/h | 50 mph | 48 mph |
| 100 km/h | 95.7 km/h | 62 mph | 59 mph |
| 120 km/h | 114.8 km/h | 75 mph | 71 mph |
Full comparison
215/70R15
Overall diameter682.0 mm · 26.85 in
Section width215 mm · 8.46 in
Sidewall height150.5 mm · 5.93 in
Circumference2142.6 mm · 84.4 in
Revolutions per mile751
Revolutions per km467
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
-4.34%Borderline — noticeable speedometer/odometer error
Original
Overall diameter682 mm · 26.85 in
Sidewall height150.5 mm
Circumference2,142.6 mm
Revolutions / mile751.1
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 -4.34%. 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 | 38.3 km/h | 25 mph | 24 mph |
| 60 km/h | 57.4 km/h | 37 mph | 36 mph |
| 80 km/h | 76.5 km/h | 50 mph | 48 mph |
| 100 km/h | 95.7 km/h | 62 mph | 59 mph |
| 120 km/h | 114.8 km/h | 75 mph | 71 mph |
See individual specs: 215/70R15 · 205/60R16. A change this size can affect ABS/speed calibration — see wheel-speed codes if a light appears.