TireSizesFinder

265/75R15 vs 235/75R17

235/75R17 is 0.23 in (5.8 mm) taller than 265/75R15, a +0.75% diameter difference. With the speedometer set for 265/75R15, an indicated 60 mph is 60.4 mph on 235/75R17.

Is this a safe swap?

Diameter difference +0.75%: under 1%

By overall diameter alone, 235/75R17 is a near match for 265/75R15; 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: 265/75R15 (30.65 in) vs 235/75R17 (30.88 in)265/75R1530.65 in × 10.43 in235/75R1730.88 in × 9.25 in
Side profile and tread width, drawn to the same scale.
265/75R15 vs 235/75R17 differences
Measurement265/75R15235/75R17Difference% diff
Overall diameter30.65 in (778.5 mm)30.88 in (784.3 mm)+0.23 in (+5.8 mm)+0.75%
Sidewall height7.82 in (198.8 mm)6.94 in (176.3 mm)−0.89 in (−22.5 mm)−11.32%
Section width10.43 in (265.0 mm)9.25 in (235.0 mm)−1.18 in (−30.0 mm)−11.32%
Circumference96.29 in (2,445.7 mm)97.01 in (2,464.0 mm)+0.72 in (+18.2 mm)+0.75%
Revolutions per mile658653−5−0.74%
True speed with the speedometer calibrated for 265/75R15
IndicatedActual on 265/75R15Actual on 235/75R17Difference
30 mph30.0 mph30.2 mph+0.2 mph
60 mph60.0 mph60.4 mph+0.4 mph
75 mph75.0 mph75.6 mph+0.6 mph

Ride-height change: 235/75R17 raises the vehicle by 0.11 in (2.9 mm) at the axle (half the +5.8 mm diameter difference).

235/75R17 is 0.23 in taller than 265/75R15 and 30 mm narrower, a 0.75% difference in overall diameter.

With the speedometer calibrated for 265/75R15, an indicated 60 mph is actually 60.4 mph on 235/75R17, and revolutions per mile change from 658 to 653.

235/75R17 mounts on a 17-inch wheel, a plus-2 fitment from the 15-inch wheel of 265/75R15.

Size pages

Other comparisons with 265/75R15

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