TireSizesFinder

225/75R15 vs 235/60R17

235/60R17 is 0.19 in (4.7 mm) shorter than 225/75R15, a −0.65% diameter difference. With the speedometer set for 225/75R15, an indicated 60 mph is 59.6 mph on 235/60R17.

Is this a safe swap?

Diameter difference −0.65%: under 1%

By overall diameter alone, 235/60R17 is a near match for 225/75R15; 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: 225/75R15 (28.29 in) vs 235/60R17 (28.10 in)225/75R1528.29 in × 8.86 in235/60R1728.10 in × 9.25 in
Side profile and tread width, drawn to the same scale.
225/75R15 vs 235/60R17 differences
Measurement225/75R15235/60R17Difference% diff
Overall diameter28.29 in (718.5 mm)28.10 in (713.8 mm)−0.19 in (−4.7 mm)−0.65%
Sidewall height6.64 in (168.8 mm)5.55 in (141.0 mm)−1.09 in (−27.7 mm)−16.44%
Section width8.86 in (225.0 mm)9.25 in (235.0 mm)+0.39 in (+10.0 mm)+4.44%
Circumference88.87 in (2,257.2 mm)88.29 in (2,242.5 mm)−0.58 in (−14.8 mm)−0.65%
Revolutions per mile713718+5+0.66%
True speed with the speedometer calibrated for 225/75R15
IndicatedActual on 225/75R15Actual on 235/60R17Difference
30 mph30.0 mph29.8 mph−0.2 mph
60 mph60.0 mph59.6 mph−0.4 mph
75 mph75.0 mph74.5 mph−0.5 mph

Ride-height change: 235/60R17 lowers the vehicle by 0.09 in (2.4 mm) at the axle (half the −4.7 mm diameter difference).

235/60R17 is 0.19 in shorter than 225/75R15 and 10 mm wider, a 0.65% difference in overall diameter.

With the speedometer calibrated for 225/75R15, an indicated 60 mph is actually 59.6 mph on 235/60R17, and revolutions per mile change from 713 to 718.

235/60R17 mounts on a 17-inch wheel, a plus-2 fitment from the 15-inch wheel of 225/75R15.

Size pages

Other comparisons with 225/75R15

Other comparisons with 235/60R17

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