TireSizesFinder

245/75R16 vs 235/75R17

235/75R17 is 0.41 in (10.4 mm) taller than 245/75R16, a +1.34% diameter difference. With the speedometer set for 245/75R16, an indicated 60 mph is 60.8 mph on 235/75R17.

Is this a safe swap?

Diameter difference +1.34%: within the ±3% guideline

By overall diameter alone, 235/75R17 falls inside the ±3% range commonly used as a guideline when replacing 245/75R16. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 245/75R16 (30.47 in) vs 235/75R17 (30.88 in)245/75R1630.47 in × 9.65 in235/75R1730.88 in × 9.25 in
Side profile and tread width, drawn to the same scale.
245/75R16 vs 235/75R17 differences
Measurement245/75R16235/75R17Difference% diff
Overall diameter30.47 in (773.9 mm)30.88 in (784.3 mm)+0.41 in (+10.4 mm)+1.34%
Sidewall height7.23 in (183.8 mm)6.94 in (176.3 mm)−0.30 in (−7.5 mm)−4.08%
Section width9.65 in (245.0 mm)9.25 in (235.0 mm)−0.39 in (−10.0 mm)−4.08%
Circumference95.72 in (2,431.3 mm)97.01 in (2,464.0 mm)+1.29 in (+32.7 mm)+1.34%
Revolutions per mile662653−9−1.33%
True speed with the speedometer calibrated for 245/75R16
IndicatedActual on 245/75R16Actual on 235/75R17Difference
30 mph30.0 mph30.4 mph+0.4 mph
60 mph60.0 mph60.8 mph+0.8 mph
75 mph75.0 mph76.0 mph+1.0 mph

Ride-height change: 235/75R17 raises the vehicle by 0.20 in (5.2 mm) at the axle (half the +10.4 mm diameter difference).

235/75R17 is 0.41 in taller than 245/75R16 and 10 mm narrower, a 1.34% difference in overall diameter.

With the speedometer calibrated for 245/75R16, an indicated 60 mph is actually 60.8 mph on 235/75R17, and revolutions per mile change from 662 to 653.

235/75R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 245/75R16.

Size pages

Other comparisons with 245/75R16

Other comparisons with 235/75R17

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