TireSizesFinder

245/75R15 vs 235/70R16

235/70R16 is 0.52 in (13.1 mm) shorter than 245/75R15, a −1.75% diameter difference. With the speedometer set for 245/75R15, an indicated 60 mph is 58.9 mph on 235/70R16.

Is this a safe swap?

Diameter difference −1.75%: within the ±3% guideline

By overall diameter alone, 235/70R16 falls inside the ±3% range commonly used as a guideline when replacing 245/75R15. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 245/75R15 (29.47 in) vs 235/70R16 (28.95 in)245/75R1529.47 in × 9.65 in235/70R1628.95 in × 9.25 in
Side profile and tread width, drawn to the same scale.
245/75R15 vs 235/70R16 differences
Measurement245/75R15235/70R16Difference% diff
Overall diameter29.47 in (748.5 mm)28.95 in (735.4 mm)−0.52 in (−13.1 mm)−1.75%
Sidewall height7.23 in (183.8 mm)6.48 in (164.5 mm)−0.76 in (−19.2 mm)−10.48%
Section width9.65 in (245.0 mm)9.25 in (235.0 mm)−0.39 in (−10.0 mm)−4.08%
Circumference92.58 in (2,351.5 mm)90.96 in (2,310.3 mm)−1.62 in (−41.2 mm)−1.75%
Revolutions per mile684697+12+1.78%
True speed with the speedometer calibrated for 245/75R15
IndicatedActual on 245/75R15Actual on 235/70R16Difference
30 mph30.0 mph29.5 mph−0.5 mph
60 mph60.0 mph58.9 mph−1.1 mph
75 mph75.0 mph73.7 mph−1.3 mph

Ride-height change: 235/70R16 lowers the vehicle by 0.26 in (6.6 mm) at the axle (half the −13.1 mm diameter difference).

235/70R16 is 0.52 in shorter than 245/75R15 and 10 mm narrower, a 1.75% difference in overall diameter.

With the speedometer calibrated for 245/75R15, an indicated 60 mph is actually 58.9 mph on 235/70R16, and revolutions per mile change from 684 to 697.

235/70R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 245/75R15.

Size pages

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