-3.07%Borderline — noticeable speedometer/odometer error
Speedometer error
With a speedometer calibrated to 195/65R15, fitting 195/60R15 makes it read as follows:
| Speedo shows | True speed | Speedo shows | True speed |
|---|---|---|---|
| 40 km/h | 38.8 km/h | 25 mph | 24 mph |
| 60 km/h | 58.2 km/h | 37 mph | 36 mph |
| 80 km/h | 77.5 km/h | 50 mph | 48 mph |
| 100 km/h | 96.9 km/h | 62 mph | 60 mph |
| 120 km/h | 116.3 km/h | 75 mph | 72 mph |
Full comparison
195/65R15
Overall diameter634.5 mm · 24.98 in
Section width195 mm · 7.68 in
Sidewall height126.8 mm · 4.99 in
Circumference1993.3 mm · 78.5 in
Revolutions per mile807
Revolutions per km502
195/60R15
Overall diameter615.0 mm · 24.21 in
Section width195 mm · 7.68 in
Sidewall height117.0 mm · 4.61 in
Circumference1932.1 mm · 76.1 in
Revolutions per mile833
Revolutions per km518
-3.07%Borderline — noticeable speedometer/odometer error
Original
Overall diameter634.5 mm · 24.98 in
Sidewall height126.8 mm
Circumference1,993.3 mm
Revolutions / mile807.4
New
Overall diameter615 mm · 24.21 in
Sidewall height117 mm
Circumference1,932.1 mm
Revolutions / mile833
Speedometer & odometer error
The new tire changes overall diameter by -3.07%. 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 | 38.8 km/h | 25 mph | 24 mph |
| 60 km/h | 58.2 km/h | 37 mph | 36 mph |
| 80 km/h | 77.5 km/h | 50 mph | 48 mph |
| 100 km/h | 96.9 km/h | 62 mph | 60 mph |
| 120 km/h | 116.3 km/h | 75 mph | 72 mph |
See individual specs: 195/65R15 · 195/60R15. A change this size can affect ABS/speed calibration — see wheel-speed codes if a light appears.