TireSizesFinder

32x11.50R15 vs 235/80R17

235/80R17 is 0.20 in (5.0 mm) shorter than 32x11.50R15, a −0.62% diameter difference. With the speedometer set for 32x11.50R15, an indicated 60 mph is 59.6 mph on 235/80R17.

Is this a safe swap?

Diameter difference −0.62%: under 1%

By overall diameter alone, 235/80R17 is a near match for 32x11.50R15; 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: 32x11.50R15 (32.00 in) vs 235/80R17 (31.80 in)32x11.50R1532.00 in × 11.50 in235/80R1731.80 in × 9.25 in
Side profile and tread width, drawn to the same scale.
32x11.50R15 vs 235/80R17 differences
Measurement32x11.50R15235/80R17Difference% diff
Overall diameter32.00 in (812.8 mm)31.80 in (807.8 mm)−0.20 in (−5.0 mm)−0.62%
Sidewall height8.50 in (215.9 mm)7.40 in (188.0 mm)−1.10 in (−27.9 mm)−12.92%
Section width11.50 in (292.1 mm)9.25 in (235.0 mm)−2.25 in (−57.1 mm)−19.55%
Circumference100.53 in (2,553.5 mm)99.91 in (2,537.8 mm)−0.62 in (−15.7 mm)−0.62%
Revolutions per mile630634+4+0.62%
True speed with the speedometer calibrated for 32x11.50R15
IndicatedActual on 32x11.50R15Actual on 235/80R17Difference
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: 235/80R17 lowers the vehicle by 0.10 in (2.5 mm) at the axle (half the −5.0 mm diameter difference).

235/80R17 is 0.20 in shorter than 32x11.50R15 and 57 mm narrower, a 0.62% difference in overall diameter.

With the speedometer calibrated for 32x11.50R15, an indicated 60 mph is actually 59.6 mph on 235/80R17, and revolutions per mile change from 630 to 634.

235/80R17 mounts on a 17-inch wheel, a plus-2 fitment from the 15-inch wheel of 32x11.50R15.

Size pages

Other comparisons with 32x11.50R15

Other comparisons with 235/80R17

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