225/75R15 vs 215/70R16

215/70R16 is 0.44 in (11.1 mm) shorter than 225/75R15, a −1.54% diameter difference. With the speedometer set for 225/75R15, an indicated 60 mph is 59.1 mph on 215/70R16.

Is this a safe swap?

Diameter difference −1.54%: within the ±3% guideline

By overall diameter alone, 215/70R16 falls inside the ±3% range commonly used as a guideline when replacing 225/75R15. 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.

225/75R15 vs 215/70R16 differences
Measurement	225/75R15	215/70R16	Difference	% diff
Overall diameter	28.29 in (718.5 mm)	27.85 in (707.4 mm)	−0.44 in (−11.1 mm)	−1.54%
Sidewall height	6.64 in (168.8 mm)	5.93 in (150.5 mm)	−0.72 in (−18.2 mm)	−10.81%
Section width	8.86 in (225.0 mm)	8.46 in (215.0 mm)	−0.39 in (−10.0 mm)	−4.44%
Circumference	88.87 in (2,257.2 mm)	87.49 in (2,222.4 mm)	−1.37 in (−34.9 mm)	−1.54%
Revolutions per mile	713	724	+11	+1.57%

True speed with the speedometer calibrated for 225/75R15
Indicated	Actual on 225/75R15	Actual on 215/70R16	Difference
30 mph	30.0 mph	29.5 mph	−0.5 mph
60 mph	60.0 mph	59.1 mph	−0.9 mph
75 mph	75.0 mph	73.8 mph	−1.2 mph

Ride-height change: 215/70R16 lowers the vehicle by 0.22 in (5.6 mm) at the axle (half the −11.1 mm diameter difference).

215/70R16 is 0.44 in shorter than 225/75R15 and 10 mm narrower, a 1.54% difference in overall diameter.

With the speedometer calibrated for 225/75R15, an indicated 60 mph is actually 59.1 mph on 215/70R16, and revolutions per mile change from 713 to 724.

215/70R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 225/75R15.

Size pages

Other comparisons with 225/75R15

Other comparisons with 215/70R16

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