TireSizesFinder

225/65R16 vs 245/55R17

245/55R17 is 0.09 in (2.4 mm) taller than 225/65R16, a +0.34% diameter difference. With the speedometer set for 225/65R16, an indicated 60 mph is 60.2 mph on 245/55R17.

Is this a safe swap?

Diameter difference +0.34%: under 1%

By overall diameter alone, 245/55R17 is a near match for 225/65R16; 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: 225/65R16 (27.52 in) vs 245/55R17 (27.61 in)225/65R1627.52 in × 8.86 in245/55R1727.61 in × 9.65 in
Side profile and tread width, drawn to the same scale.
225/65R16 vs 245/55R17 differences
Measurement225/65R16245/55R17Difference% diff
Overall diameter27.52 in (698.9 mm)27.61 in (701.3 mm)+0.09 in (+2.4 mm)+0.34%
Sidewall height5.76 in (146.3 mm)5.31 in (134.8 mm)−0.45 in (−11.5 mm)−7.86%
Section width8.86 in (225.0 mm)9.65 in (245.0 mm)+0.79 in (+20.0 mm)+8.89%
Circumference86.44 in (2,195.7 mm)86.74 in (2,203.2 mm)+0.30 in (+7.5 mm)+0.34%
Revolutions per mile733730−3−0.34%
True speed with the speedometer calibrated for 225/65R16
IndicatedActual on 225/65R16Actual on 245/55R17Difference
30 mph30.0 mph30.1 mph+0.1 mph
60 mph60.0 mph60.2 mph+0.2 mph
75 mph75.0 mph75.3 mph+0.3 mph

Ride-height change: 245/55R17 raises the vehicle by 0.05 in (1.2 mm) at the axle (half the +2.4 mm diameter difference).

245/55R17 is 0.09 in taller than 225/65R16 and 20 mm wider, a 0.34% difference in overall diameter.

With the speedometer calibrated for 225/65R16, an indicated 60 mph is actually 60.2 mph on 245/55R17, and revolutions per mile change from 733 to 730.

245/55R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 225/65R16.

Size pages

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