215/60R15 vs 225/50R16

225/50R16 is 0.30 in (7.6 mm) shorter than 215/60R15, a −1.19% diameter difference. With the speedometer set for 215/60R15, an indicated 60 mph is 59.3 mph on 225/50R16.

Is this a safe swap?

Diameter difference −1.19%: within the ±3% guideline

By overall diameter alone, 225/50R16 falls inside the ±3% range commonly used as a guideline when replacing 215/60R15. 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.

215/60R15 vs 225/50R16 differences
Measurement	215/60R15	225/50R16	Difference	% diff
Overall diameter	25.16 in (639.0 mm)	24.86 in (631.4 mm)	−0.30 in (−7.6 mm)	−1.19%
Sidewall height	5.08 in (129.0 mm)	4.43 in (112.5 mm)	−0.65 in (−16.5 mm)	−12.79%
Section width	8.46 in (215.0 mm)	8.86 in (225.0 mm)	+0.39 in (+10.0 mm)	+4.65%
Circumference	79.03 in (2,007.5 mm)	78.09 in (1,983.6 mm)	−0.94 in (−23.9 mm)	−1.19%
Revolutions per mile	802	811	+10	+1.20%

True speed with the speedometer calibrated for 215/60R15
Indicated	Actual on 215/60R15	Actual on 225/50R16	Difference
30 mph	30.0 mph	29.6 mph	−0.4 mph
60 mph	60.0 mph	59.3 mph	−0.7 mph
75 mph	75.0 mph	74.1 mph	−0.9 mph

Ride-height change: 225/50R16 lowers the vehicle by 0.15 in (3.8 mm) at the axle (half the −7.6 mm diameter difference).

225/50R16 is 0.30 in shorter than 215/60R15 and 10 mm wider, a 1.19% difference in overall diameter.

With the speedometer calibrated for 215/60R15, an indicated 60 mph is actually 59.3 mph on 225/50R16, and revolutions per mile change from 802 to 811.

225/50R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 215/60R15.

Size pages

Other comparisons with 215/60R15

Other comparisons with 225/50R16

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