225/50R17 vs 235/50R17

235/50R17 is 0.39 in (10.0 mm) taller than 225/50R17, a +1.52% diameter difference. With the speedometer set for 225/50R17, an indicated 60 mph is 60.9 mph on 235/50R17.

Is this a safe swap?

Diameter difference +1.52%: within the ±3% guideline

By overall diameter alone, 235/50R17 falls inside the ±3% range commonly used as a guideline when replacing 225/50R17. 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.

225/50R17 vs 235/50R17 differences
Measurement	225/50R17	235/50R17	Difference	% diff
Overall diameter	25.86 in (656.8 mm)	26.25 in (666.8 mm)	+0.39 in (+10.0 mm)	+1.52%
Sidewall height	4.43 in (112.5 mm)	4.63 in (117.5 mm)	+0.20 in (+5.0 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	81.24 in (2,063.4 mm)	82.47 in (2,094.8 mm)	+1.24 in (+31.4 mm)	+1.52%
Revolutions per mile	780	768	−12	−1.50%

True speed with the speedometer calibrated for 225/50R17
Indicated	Actual on 225/50R17	Actual on 235/50R17	Difference
30 mph	30.0 mph	30.5 mph	+0.5 mph
60 mph	60.0 mph	60.9 mph	+0.9 mph
75 mph	75.0 mph	76.1 mph	+1.1 mph

Ride-height change: 235/50R17 raises the vehicle by 0.20 in (5.0 mm) at the axle (half the +10.0 mm diameter difference).

235/50R17 is 0.39 in taller than 225/50R17 and 10 mm wider, a 1.52% difference in overall diameter.

With the speedometer calibrated for 225/50R17, an indicated 60 mph is actually 60.9 mph on 235/50R17, and revolutions per mile change from 780 to 768.

Both sizes mount on 17-inch wheels.

Size pages

Other comparisons with 225/50R17

Other comparisons with 235/50R17

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