TireSizesFinder

215/60R17 vs 235/55R17

235/55R17 is 0.02 in (0.5 mm) taller than 215/60R17, a +0.07% diameter difference. With the speedometer set for 215/60R17, an indicated 60 mph is 60.0 mph on 235/55R17.

Is this a safe swap?

Diameter difference +0.07%: under 1%

By overall diameter alone, 235/55R17 is a near match for 215/60R17; 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: 215/60R17 (27.16 in) vs 235/55R17 (27.18 in)215/60R1727.16 in × 8.46 in235/55R1727.18 in × 9.25 in
Side profile and tread width, drawn to the same scale.
215/60R17 vs 235/55R17 differences
Measurement215/60R17235/55R17Difference% diff
Overall diameter27.16 in (689.8 mm)27.18 in (690.3 mm)+0.02 in (+0.5 mm)+0.07%
Sidewall height5.08 in (129.0 mm)5.09 in (129.3 mm)+0.01 in (+0.3 mm)+0.19%
Section width8.46 in (215.0 mm)9.25 in (235.0 mm)+0.79 in (+20.0 mm)+9.30%
Circumference85.32 in (2,167.1 mm)85.38 in (2,168.6 mm)+0.06 in (+1.6 mm)+0.07%
Revolutions per mile743742−1−0.07%
True speed with the speedometer calibrated for 215/60R17
IndicatedActual on 215/60R17Actual on 235/55R17Difference
30 mph30.0 mph30.0 mph0.0 mph
60 mph60.0 mph60.0 mph0.0 mph
75 mph75.0 mph75.1 mph+0.1 mph

Ride-height change: 235/55R17 raises the vehicle by 0.01 in (0.3 mm) at the axle (half the +0.5 mm diameter difference).

235/55R17 is 0.02 in taller than 215/60R17 and 20 mm wider, a 0.07% difference in overall diameter.

With the speedometer calibrated for 215/60R17, an indicated 60 mph is actually 60.0 mph on 235/55R17, and revolutions per mile change from 743 to 742.

Both sizes mount on 17-inch wheels.

Size pages

Other comparisons with 215/60R17

Other comparisons with 235/55R17

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