245/70R16 vs 235/75R16

235/75R16 is 0.37 in (9.5 mm) taller than 245/70R16, a +1.27% diameter difference. With the speedometer set for 245/70R16, an indicated 60 mph is 60.8 mph on 235/75R16.

Is this a safe swap?

Diameter difference +1.27%: within the ±3% guideline

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

Side profile and tread width, drawn to the same scale.

245/70R16 vs 235/75R16 differences
Measurement	245/70R16	235/75R16	Difference	% diff
Overall diameter	29.50 in (749.4 mm)	29.88 in (758.9 mm)	+0.37 in (+9.5 mm)	+1.27%
Sidewall height	6.75 in (171.5 mm)	6.94 in (176.3 mm)	+0.19 in (+4.8 mm)	+2.77%
Section width	9.65 in (245.0 mm)	9.25 in (235.0 mm)	−0.39 in (−10.0 mm)	−4.08%
Circumference	92.69 in (2,354.3 mm)	93.86 in (2,384.2 mm)	+1.18 in (+29.8 mm)	+1.27%
Revolutions per mile	684	675	−9	−1.25%

True speed with the speedometer calibrated for 245/70R16
Indicated	Actual on 245/70R16	Actual on 235/75R16	Difference
30 mph	30.0 mph	30.4 mph	+0.4 mph
60 mph	60.0 mph	60.8 mph	+0.8 mph
75 mph	75.0 mph	76.0 mph	+1.0 mph

Ride-height change: 235/75R16 raises the vehicle by 0.19 in (4.8 mm) at the axle (half the +9.5 mm diameter difference).

235/75R16 is 0.37 in taller than 245/70R16 and 10 mm narrower, a 1.27% difference in overall diameter.

With the speedometer calibrated for 245/70R16, an indicated 60 mph is actually 60.8 mph on 235/75R16, and revolutions per mile change from 684 to 675.

Both sizes mount on 16-inch wheels.

Size pages

Other comparisons with 245/70R16

Other comparisons with 235/75R16

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.