225/60R15 vs 215/55R16

215/55R16 is 0.32 in (8.1 mm) shorter than 225/60R15, a −1.24% diameter difference. With the speedometer set for 225/60R15, an indicated 60 mph is 59.3 mph on 215/55R16.

Is this a safe swap?

Diameter difference −1.24%: within the ±3% guideline

By overall diameter alone, 215/55R16 falls inside the ±3% range commonly used as a guideline when replacing 225/60R15. 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.

225/60R15 vs 215/55R16 differences
Measurement	225/60R15	215/55R16	Difference	% diff
Overall diameter	25.63 in (651.0 mm)	25.31 in (642.9 mm)	−0.32 in (−8.1 mm)	−1.24%
Sidewall height	5.31 in (135.0 mm)	4.66 in (118.3 mm)	−0.66 in (−16.7 mm)	−12.41%
Section width	8.86 in (225.0 mm)	8.46 in (215.0 mm)	−0.39 in (−10.0 mm)	−4.44%
Circumference	80.52 in (2,045.2 mm)	79.52 in (2,019.7 mm)	−1.00 in (−25.4 mm)	−1.24%
Revolutions per mile	787	797	+10	+1.26%

True speed with the speedometer calibrated for 225/60R15
Indicated	Actual on 225/60R15	Actual on 215/55R16	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: 215/55R16 lowers the vehicle by 0.16 in (4.1 mm) at the axle (half the −8.1 mm diameter difference).

215/55R16 is 0.32 in shorter than 225/60R15 and 10 mm narrower, a 1.24% difference in overall diameter.

With the speedometer calibrated for 225/60R15, an indicated 60 mph is actually 59.3 mph on 215/55R16, and revolutions per mile change from 787 to 797.

215/55R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 225/60R15.

Size pages

Other comparisons with 225/60R15

Other comparisons with 215/55R16

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