TireSizesFinder

205/65R16 vs 225/55R17

225/55R17 is 0.25 in (6.4 mm) taller than 205/65R16, a +0.95% diameter difference. With the speedometer set for 205/65R16, an indicated 60 mph is 60.6 mph on 225/55R17.

Is this a safe swap?

Diameter difference +0.95%: under 1%

By overall diameter alone, 225/55R17 is a near match for 205/65R16; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 205/65R16 (26.49 in) vs 225/55R17 (26.74 in)205/65R1626.49 in × 8.07 in225/55R1726.74 in × 8.86 in
Side profile and tread width, drawn to the same scale.
205/65R16 vs 225/55R17 differences
Measurement205/65R16225/55R17Difference% diff
Overall diameter26.49 in (672.9 mm)26.74 in (679.3 mm)+0.25 in (+6.4 mm)+0.95%
Sidewall height5.25 in (133.3 mm)4.87 in (123.8 mm)−0.37 in (−9.5 mm)−7.13%
Section width8.07 in (205.0 mm)8.86 in (225.0 mm)+0.79 in (+20.0 mm)+9.76%
Circumference83.23 in (2,114.0 mm)84.02 in (2,134.1 mm)+0.79 in (+20.1 mm)+0.95%
Revolutions per mile761754−7−0.94%
True speed with the speedometer calibrated for 205/65R16
IndicatedActual on 205/65R16Actual on 225/55R17Difference
30 mph30.0 mph30.3 mph+0.3 mph
60 mph60.0 mph60.6 mph+0.6 mph
75 mph75.0 mph75.7 mph+0.7 mph

Ride-height change: 225/55R17 raises the vehicle by 0.13 in (3.2 mm) at the axle (half the +6.4 mm diameter difference).

225/55R17 is 0.25 in taller than 205/65R16 and 20 mm wider, a 0.95% difference in overall diameter.

With the speedometer calibrated for 205/65R16, an indicated 60 mph is actually 60.6 mph on 225/55R17, and revolutions per mile change from 761 to 754.

225/55R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 205/65R16.

Size pages

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Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.