195/75R14 vs 225/60R15

225/60R15 is 0.11 in (2.9 mm) taller than 195/75R14, a +0.45% diameter difference. With the speedometer set for 195/75R14, an indicated 60 mph is 60.3 mph on 225/60R15.

Is this a safe swap?

Diameter difference +0.45%: under 1%

By overall diameter alone, 225/60R15 is a near match for 195/75R14; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

Side profile and tread width, drawn to the same scale.

195/75R14 vs 225/60R15 differences
Measurement	195/75R14	225/60R15	Difference	% diff
Overall diameter	25.52 in (648.1 mm)	25.63 in (651.0 mm)	+0.11 in (+2.9 mm)	+0.45%
Sidewall height	5.76 in (146.3 mm)	5.31 in (135.0 mm)	−0.44 in (−11.2 mm)	−7.69%
Section width	7.68 in (195.0 mm)	8.86 in (225.0 mm)	+1.18 in (+30.0 mm)	+15.38%
Circumference	80.16 in (2,036.1 mm)	80.52 in (2,045.2 mm)	+0.36 in (+9.1 mm)	+0.45%
Revolutions per mile	790	787	−4	−0.45%

True speed with the speedometer calibrated for 195/75R14
Indicated	Actual on 195/75R14	Actual on 225/60R15	Difference
30 mph	30.0 mph	30.1 mph	+0.1 mph
60 mph	60.0 mph	60.3 mph	+0.3 mph
75 mph	75.0 mph	75.3 mph	+0.3 mph

Ride-height change: 225/60R15 raises the vehicle by 0.06 in (1.5 mm) at the axle (half the +2.9 mm diameter difference).

225/60R15 is 0.11 in taller than 195/75R14 and 30 mm wider, a 0.45% difference in overall diameter.

With the speedometer calibrated for 195/75R14, an indicated 60 mph is actually 60.3 mph on 225/60R15, and revolutions per mile change from 790 to 787.

225/60R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 195/75R14.

Size pages

Other comparisons with 195/75R14

Other comparisons with 225/60R15

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.