205/60R15 vs 225/50R16

225/50R16 is 0.17 in (4.4 mm) taller than 205/60R15, a +0.70% diameter difference. With the speedometer set for 205/60R15, an indicated 60 mph is 60.4 mph on 225/50R16.

Is this a safe swap?

Diameter difference +0.70%: under 1%

By overall diameter alone, 225/50R16 is a near match for 205/60R15; 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.

205/60R15 vs 225/50R16 differences
Measurement	205/60R15	225/50R16	Difference	% diff
Overall diameter	24.69 in (627.0 mm)	24.86 in (631.4 mm)	+0.17 in (+4.4 mm)	+0.70%
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	77.55 in (1,969.8 mm)	78.09 in (1,983.6 mm)	+0.54 in (+13.8 mm)	+0.70%
Revolutions per mile	817	811	−6	−0.70%

True speed with the speedometer calibrated for 205/60R15
Indicated	Actual on 205/60R15	Actual on 225/50R16	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: 225/50R16 raises the vehicle by 0.09 in (2.2 mm) at the axle (half the +4.4 mm diameter difference).

225/50R16 is 0.17 in taller than 205/60R15 and 20 mm wider, a 0.70% difference in overall diameter.

With the speedometer calibrated for 205/60R15, an indicated 60 mph is actually 60.4 mph on 225/50R16, and revolutions per mile change from 817 to 811.

225/50R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 205/60R15.

Size pages

Other comparisons with 205/60R15

Other comparisons with 225/50R16

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