225/75R16 vs 235/75R16

235/75R16 is 0.59 in (15.0 mm) taller than 225/75R16, a +2.02% diameter difference. With the speedometer set for 225/75R16, an indicated 60 mph is 61.2 mph on 235/75R16.

Is this a safe swap?

Diameter difference +2.02%: within the ±3% guideline

By overall diameter alone, 235/75R16 falls inside the ±3% range commonly used as a guideline when replacing 225/75R16. 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.

225/75R16 vs 235/75R16 differences
Measurement	225/75R16	235/75R16	Difference	% diff
Overall diameter	29.29 in (743.9 mm)	29.88 in (758.9 mm)	+0.59 in (+15.0 mm)	+2.02%
Sidewall height	6.64 in (168.8 mm)	6.94 in (176.3 mm)	+0.30 in (+7.5 mm)	+4.44%
Section width	8.86 in (225.0 mm)	9.25 in (235.0 mm)	+0.39 in (+10.0 mm)	+4.44%
Circumference	92.01 in (2,337.0 mm)	93.86 in (2,384.2 mm)	+1.86 in (+47.1 mm)	+2.02%
Revolutions per mile	689	675	−14	−1.98%

True speed with the speedometer calibrated for 225/75R16
Indicated	Actual on 225/75R16	Actual on 235/75R16	Difference
30 mph	30.0 mph	30.6 mph	+0.6 mph
60 mph	60.0 mph	61.2 mph	+1.2 mph
75 mph	75.0 mph	76.5 mph	+1.5 mph

Ride-height change: 235/75R16 raises the vehicle by 0.30 in (7.5 mm) at the axle (half the +15.0 mm diameter difference).

235/75R16 is 0.59 in taller than 225/75R16 and 10 mm wider, a 2.02% difference in overall diameter.

With the speedometer calibrated for 225/75R16, an indicated 60 mph is actually 61.2 mph on 235/75R16, and revolutions per mile change from 689 to 675.

Both sizes mount on 16-inch wheels.

Size pages

Other comparisons with 225/75R16

Other comparisons with 235/75R16

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