205/60R14 vs 225/50R15

225/50R15 is 0.17 in (4.4 mm) taller than 205/60R14, a +0.73% diameter difference. With the speedometer set for 205/60R14, an indicated 60 mph is 60.4 mph on 225/50R15.

Is this a safe swap?

Diameter difference +0.73%: under 1%

By overall diameter alone, 225/50R15 is a near match for 205/60R14; 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.

205/60R14 vs 225/50R15 differences
Measurement	205/60R14	225/50R15	Difference	% diff
Overall diameter	23.69 in (601.6 mm)	23.86 in (606.0 mm)	+0.17 in (+4.4 mm)	+0.73%
Sidewall height	4.84 in (123.0 mm)	4.43 in (112.5 mm)	−0.41 in (−10.5 mm)	−8.54%
Section width	8.07 in (205.0 mm)	8.86 in (225.0 mm)	+0.79 in (+20.0 mm)	+9.76%
Circumference	74.41 in (1,890.0 mm)	74.95 in (1,903.8 mm)	+0.54 in (+13.8 mm)	+0.73%
Revolutions per mile	852	845	−6	−0.73%

True speed with the speedometer calibrated for 205/60R14
Indicated	Actual on 205/60R14	Actual on 225/50R15	Difference
30 mph	30.0 mph	30.2 mph	+0.2 mph
60 mph	60.0 mph	60.4 mph	+0.4 mph
75 mph	75.0 mph	75.5 mph	+0.5 mph

Ride-height change: 225/50R15 raises the vehicle by 0.09 in (2.2 mm) at the axle (half the +4.4 mm diameter difference).

225/50R15 is 0.17 in taller than 205/60R14 and 20 mm wider, a 0.73% difference in overall diameter.

With the speedometer calibrated for 205/60R14, an indicated 60 mph is actually 60.4 mph on 225/50R15, and revolutions per mile change from 852 to 845.

225/50R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 205/60R14.

Size pages

Other comparisons with 205/60R14

Other comparisons with 225/50R15

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