TireSizesFinder

235/60R15 vs 225/50R17

225/50R17 is 0.24 in (6.2 mm) shorter than 235/60R15, a −0.94% diameter difference. With the speedometer set for 235/60R15, an indicated 60 mph is 59.4 mph on 225/50R17.

Is this a safe swap?

Diameter difference −0.94%: under 1%

By overall diameter alone, 225/50R17 is a near match for 235/60R15; 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: 235/60R15 (26.10 in) vs 225/50R17 (25.86 in)235/60R1526.10 in × 9.25 in225/50R1725.86 in × 8.86 in
Side profile and tread width, drawn to the same scale.
235/60R15 vs 225/50R17 differences
Measurement235/60R15225/50R17Difference% diff
Overall diameter26.10 in (663.0 mm)25.86 in (656.8 mm)−0.24 in (−6.2 mm)−0.94%
Sidewall height5.55 in (141.0 mm)4.43 in (112.5 mm)−1.12 in (−28.5 mm)−20.21%
Section width9.25 in (235.0 mm)8.86 in (225.0 mm)−0.39 in (−10.0 mm)−4.26%
Circumference82.00 in (2,082.9 mm)81.24 in (2,063.4 mm)−0.77 in (−19.5 mm)−0.94%
Revolutions per mile773780+7+0.94%
True speed with the speedometer calibrated for 235/60R15
IndicatedActual on 235/60R15Actual on 225/50R17Difference
30 mph30.0 mph29.7 mph−0.3 mph
60 mph60.0 mph59.4 mph−0.6 mph
75 mph75.0 mph74.3 mph−0.7 mph

Ride-height change: 225/50R17 lowers the vehicle by 0.12 in (3.1 mm) at the axle (half the −6.2 mm diameter difference).

225/50R17 is 0.24 in shorter than 235/60R15 and 10 mm narrower, a 0.94% difference in overall diameter.

With the speedometer calibrated for 235/60R15, an indicated 60 mph is actually 59.4 mph on 225/50R17, and revolutions per mile change from 773 to 780.

225/50R17 mounts on a 17-inch wheel, a plus-2 fitment from the 15-inch wheel of 235/60R15.

Size pages

Other comparisons with 235/60R15

Other comparisons with 225/50R17

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