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Tire Size Comparison

195/65R15 vs 195/60R15

Switching from 195/65R15 to 195/60R15 changes overall diameter by -3.07% (24.98 in → 24.21 in).

-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 showsTrue speedSpeedo showsTrue speed
40 km/h38.8 km/h25 mph24 mph
60 km/h58.2 km/h37 mph36 mph
80 km/h77.5 km/h50 mph48 mph
100 km/h96.9 km/h62 mph60 mph
120 km/h116.3 km/h75 mph72 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
Original tire
New tire
-3.07%Borderline — noticeable speedometer/odometer error
2524.2
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 showsTrue speedSpeedo showsTrue speed
40 km/h38.8 km/h25 mph24 mph
60 km/h58.2 km/h37 mph36 mph
80 km/h77.5 km/h50 mph48 mph
100 km/h96.9 km/h62 mph60 mph
120 km/h116.3 km/h75 mph72 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.