TireSizesFinder

215/60R15 vs 235/45R17

235/45R17 is 0.17 in (4.3 mm) taller than 215/60R15, a +0.67% diameter difference. With the speedometer set for 215/60R15, an indicated 60 mph is 60.4 mph on 235/45R17.

Is this a safe swap?

Diameter difference +0.67%: under 1%

By overall diameter alone, 235/45R17 is a near match for 215/60R15; 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: 215/60R15 (25.16 in) vs 235/45R17 (25.33 in)215/60R1525.16 in × 8.46 in235/45R1725.33 in × 9.25 in
Side profile and tread width, drawn to the same scale.
215/60R15 vs 235/45R17 differences
Measurement215/60R15235/45R17Difference% diff
Overall diameter25.16 in (639.0 mm)25.33 in (643.3 mm)+0.17 in (+4.3 mm)+0.67%
Sidewall height5.08 in (129.0 mm)4.16 in (105.8 mm)−0.92 in (−23.2 mm)−18.02%
Section width8.46 in (215.0 mm)9.25 in (235.0 mm)+0.79 in (+20.0 mm)+9.30%
Circumference79.03 in (2,007.5 mm)79.57 in (2,021.0 mm)+0.53 in (+13.5 mm)+0.67%
Revolutions per mile802796−5−0.67%
True speed with the speedometer calibrated for 215/60R15
IndicatedActual on 215/60R15Actual on 235/45R17Difference
30 mph30.0 mph30.2 mph+0.2 mph
60 mph60.0 mph60.4 mph+0.4 mph
75 mph75.0 mph75.5 mph+0.5 mph

Ride-height change: 235/45R17 raises the vehicle by 0.08 in (2.1 mm) at the axle (half the +4.3 mm diameter difference).

235/45R17 is 0.17 in taller than 215/60R15 and 20 mm wider, a 0.67% difference in overall diameter.

With the speedometer calibrated for 215/60R15, an indicated 60 mph is actually 60.4 mph on 235/45R17, and revolutions per mile change from 802 to 796.

235/45R17 mounts on a 17-inch wheel, a plus-2 fitment from the 15-inch wheel of 215/60R15.

Size pages

Other comparisons with 215/60R15

Other comparisons with 235/45R17

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