TireSizesFinder

265/65R17 vs 235/75R17

235/75R17 is 0.31 in (8.0 mm) taller than 265/65R17, a +1.03% diameter difference. With the speedometer set for 265/65R17, an indicated 60 mph is 60.6 mph on 235/75R17.

Is this a safe swap?

Diameter difference +1.03%: within the ±3% guideline

By overall diameter alone, 235/75R17 falls inside the ±3% range commonly used as a guideline when replacing 265/65R17. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 265/65R17 (30.56 in) vs 235/75R17 (30.88 in)265/65R1730.56 in × 10.43 in235/75R1730.88 in × 9.25 in
Side profile and tread width, drawn to the same scale.
265/65R17 vs 235/75R17 differences
Measurement265/65R17235/75R17Difference% diff
Overall diameter30.56 in (776.3 mm)30.88 in (784.3 mm)+0.31 in (+8.0 mm)+1.03%
Sidewall height6.78 in (172.3 mm)6.94 in (176.3 mm)+0.16 in (+4.0 mm)+2.32%
Section width10.43 in (265.0 mm)9.25 in (235.0 mm)−1.18 in (−30.0 mm)−11.32%
Circumference96.02 in (2,438.8 mm)97.01 in (2,464.0 mm)+0.99 in (+25.1 mm)+1.03%
Revolutions per mile660653−7−1.02%
True speed with the speedometer calibrated for 265/65R17
IndicatedActual on 265/65R17Actual on 235/75R17Difference
30 mph30.0 mph30.3 mph+0.3 mph
60 mph60.0 mph60.6 mph+0.6 mph
75 mph75.0 mph75.8 mph+0.8 mph

Ride-height change: 235/75R17 raises the vehicle by 0.16 in (4.0 mm) at the axle (half the +8.0 mm diameter difference).

235/75R17 is 0.31 in taller than 265/65R17 and 30 mm narrower, a 1.03% difference in overall diameter.

With the speedometer calibrated for 265/65R17, an indicated 60 mph is actually 60.6 mph on 235/75R17, and revolutions per mile change from 660 to 653.

Both sizes mount on 17-inch wheels.

Size pages

Other comparisons with 265/65R17

Other comparisons with 235/75R17

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