225/35R19 vs 235/35R19

235/35R19 is 0.28 in (7.0 mm) taller than 225/35R19, a +1.09% diameter difference. With the speedometer set for 225/35R19, an indicated 60 mph is 60.7 mph on 235/35R19.

Is this a safe swap?

Diameter difference +1.09%: within the ±3% guideline

By overall diameter alone, 235/35R19 falls inside the ±3% range commonly used as a guideline when replacing 225/35R19. 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.

225/35R19 vs 235/35R19 differences
Measurement	225/35R19	235/35R19	Difference	% diff
Overall diameter	25.20 in (640.1 mm)	25.48 in (647.1 mm)	+0.28 in (+7.0 mm)	+1.09%
Sidewall height	3.10 in (78.8 mm)	3.24 in (82.3 mm)	+0.14 in (+3.5 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	79.17 in (2,010.9 mm)	80.04 in (2,032.9 mm)	+0.87 in (+22.0 mm)	+1.09%
Revolutions per mile	800	792	−9	−1.08%

True speed with the speedometer calibrated for 225/35R19
Indicated	Actual on 225/35R19	Actual on 235/35R19	Difference
30 mph	30.0 mph	30.3 mph	+0.3 mph
60 mph	60.0 mph	60.7 mph	+0.7 mph
75 mph	75.0 mph	75.8 mph	+0.8 mph

Ride-height change: 235/35R19 raises the vehicle by 0.14 in (3.5 mm) at the axle (half the +7.0 mm diameter difference).

235/35R19 is 0.28 in taller than 225/35R19 and 10 mm wider, a 1.09% difference in overall diameter.

With the speedometer calibrated for 225/35R19, an indicated 60 mph is actually 60.7 mph on 235/35R19, and revolutions per mile change from 800 to 792.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 225/35R19

Other comparisons with 235/35R19

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