TireSizesFinder

195/65R14 vs 225/50R15

225/50R15 is 0.12 in (3.1 mm) shorter than 195/65R14, a −0.51% diameter difference. With the speedometer set for 195/65R14, an indicated 60 mph is 59.7 mph on 225/50R15.

Is this a safe swap?

Diameter difference −0.51%: under 1%

By overall diameter alone, 225/50R15 is a near match for 195/65R14; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 195/65R14 (23.98 in) vs 225/50R15 (23.86 in)195/65R1423.98 in × 7.68 in225/50R1523.86 in × 8.86 in
Side profile and tread width, drawn to the same scale.
195/65R14 vs 225/50R15 differences
Measurement195/65R14225/50R15Difference% diff
Overall diameter23.98 in (609.1 mm)23.86 in (606.0 mm)−0.12 in (−3.1 mm)−0.51%
Sidewall height4.99 in (126.8 mm)4.43 in (112.5 mm)−0.56 in (−14.2 mm)−11.24%
Section width7.68 in (195.0 mm)8.86 in (225.0 mm)+1.18 in (+30.0 mm)+15.38%
Circumference75.34 in (1,913.5 mm)74.95 in (1,903.8 mm)−0.38 in (−9.7 mm)−0.51%
Revolutions per mile841845+4+0.51%
True speed with the speedometer calibrated for 195/65R14
IndicatedActual on 195/65R14Actual on 225/50R15Difference
30 mph30.0 mph29.8 mph−0.2 mph
60 mph60.0 mph59.7 mph−0.3 mph
75 mph75.0 mph74.6 mph−0.4 mph

Ride-height change: 225/50R15 lowers the vehicle by 0.06 in (1.5 mm) at the axle (half the −3.1 mm diameter difference).

225/50R15 is 0.12 in shorter than 195/65R14 and 30 mm wider, a 0.51% difference in overall diameter.

With the speedometer calibrated for 195/65R14, an indicated 60 mph is actually 59.7 mph on 225/50R15, and revolutions per mile change from 841 to 845.

225/50R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 195/65R14.

Size pages

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Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.