215/55R17 vs 225/55R17

225/55R17 is 0.43 in (11.0 mm) taller than 215/55R17, a +1.65% diameter difference. With the speedometer set for 215/55R17, an indicated 60 mph is 61.0 mph on 225/55R17.

Is this a safe swap?

Diameter difference +1.65%: within the ±3% guideline

By overall diameter alone, 225/55R17 falls inside the ±3% range commonly used as a guideline when replacing 215/55R17. 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.

215/55R17 vs 225/55R17 differences
Measurement	215/55R17	225/55R17	Difference	% diff
Overall diameter	26.31 in (668.3 mm)	26.74 in (679.3 mm)	+0.43 in (+11.0 mm)	+1.65%
Sidewall height	4.66 in (118.3 mm)	4.87 in (123.8 mm)	+0.22 in (+5.5 mm)	+4.65%
Section width	8.46 in (215.0 mm)	8.86 in (225.0 mm)	+0.39 in (+10.0 mm)	+4.65%
Circumference	82.66 in (2,099.5 mm)	84.02 in (2,134.1 mm)	+1.36 in (+34.6 mm)	+1.65%
Revolutions per mile	767	754	−12	−1.62%

True speed with the speedometer calibrated for 215/55R17
Indicated	Actual on 215/55R17	Actual on 225/55R17	Difference
30 mph	30.0 mph	30.5 mph	+0.5 mph
60 mph	60.0 mph	61.0 mph	+1.0 mph
75 mph	75.0 mph	76.2 mph	+1.2 mph

Ride-height change: 225/55R17 raises the vehicle by 0.22 in (5.5 mm) at the axle (half the +11.0 mm diameter difference).

225/55R17 is 0.43 in taller than 215/55R17 and 10 mm wider, a 1.65% difference in overall diameter.

With the speedometer calibrated for 215/55R17, an indicated 60 mph is actually 61.0 mph on 225/55R17, and revolutions per mile change from 767 to 754.

Both sizes mount on 17-inch wheels.

Size pages

Other comparisons with 215/55R17

Other comparisons with 225/55R17

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