TireSizesFinder

225/60R15 vs 205/55R17

205/55R17 is 0.25 in (6.3 mm) taller than 225/60R15, a +0.97% diameter difference. With the speedometer set for 225/60R15, an indicated 60 mph is 60.6 mph on 205/55R17.

Is this a safe swap?

Diameter difference +0.97%: under 1%

By overall diameter alone, 205/55R17 is a near match for 225/60R15; 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: 225/60R15 (25.63 in) vs 205/55R17 (25.88 in)225/60R1525.63 in × 8.86 in205/55R1725.88 in × 8.07 in
Side profile and tread width, drawn to the same scale.
225/60R15 vs 205/55R17 differences
Measurement225/60R15205/55R17Difference% diff
Overall diameter25.63 in (651.0 mm)25.88 in (657.3 mm)+0.25 in (+6.3 mm)+0.97%
Sidewall height5.31 in (135.0 mm)4.44 in (112.8 mm)−0.88 in (−22.2 mm)−16.48%
Section width8.86 in (225.0 mm)8.07 in (205.0 mm)−0.79 in (−20.0 mm)−8.89%
Circumference80.52 in (2,045.2 mm)81.30 in (2,065.0 mm)+0.78 in (+19.8 mm)+0.97%
Revolutions per mile787779−8−0.96%
True speed with the speedometer calibrated for 225/60R15
IndicatedActual on 225/60R15Actual on 205/55R17Difference
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: 205/55R17 raises the vehicle by 0.12 in (3.1 mm) at the axle (half the +6.3 mm diameter difference).

205/55R17 is 0.25 in taller than 225/60R15 and 20 mm narrower, a 0.97% difference in overall diameter.

With the speedometer calibrated for 225/60R15, an indicated 60 mph is actually 60.6 mph on 205/55R17, and revolutions per mile change from 787 to 779.

205/55R17 mounts on a 17-inch wheel, a plus-2 fitment from the 15-inch wheel of 225/60R15.

Size pages

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