215/65R16 vs 225/55R17

225/55R17 is 0.26 in (6.6 mm) shorter than 215/65R16, a −0.96% diameter difference. With the speedometer set for 215/65R16, an indicated 60 mph is 59.4 mph on 225/55R17.

Is this a safe swap?

Diameter difference −0.96%: under 1%

By overall diameter alone, 225/55R17 is a near match for 215/65R16; 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.

215/65R16 vs 225/55R17 differences
Measurement	215/65R16	225/55R17	Difference	% diff
Overall diameter	27.00 in (685.9 mm)	26.74 in (679.3 mm)	−0.26 in (−6.6 mm)	−0.96%
Sidewall height	5.50 in (139.8 mm)	4.87 in (123.8 mm)	−0.63 in (−16.0 mm)	−11.45%
Section width	8.46 in (215.0 mm)	8.86 in (225.0 mm)	+0.39 in (+10.0 mm)	+4.65%
Circumference	84.84 in (2,154.8 mm)	84.02 in (2,134.1 mm)	−0.82 in (−20.7 mm)	−0.96%
Revolutions per mile	747	754	+7	+0.97%

True speed with the speedometer calibrated for 215/65R16
Indicated	Actual on 215/65R16	Actual on 225/55R17	Difference
30 mph	30.0 mph	29.7 mph	−0.3 mph
60 mph	60.0 mph	59.4 mph	−0.6 mph
75 mph	75.0 mph	74.3 mph	−0.7 mph

Ride-height change: 225/55R17 lowers the vehicle by 0.13 in (3.3 mm) at the axle (half the −6.6 mm diameter difference).

225/55R17 is 0.26 in shorter than 215/65R16 and 10 mm wider, a 0.96% difference in overall diameter.

With the speedometer calibrated for 215/65R16, an indicated 60 mph is actually 59.4 mph on 225/55R17, and revolutions per mile change from 747 to 754.

225/55R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 215/65R16.

Size pages

Other comparisons with 215/65R16

Other comparisons with 225/55R17

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