TireSizesFinder

225/45R19 vs 235/45R19

235/45R19 is 0.35 in (9.0 mm) taller than 225/45R19, a +1.31% diameter difference. With the speedometer set for 225/45R19, an indicated 60 mph is 60.8 mph on 235/45R19.

Is this a safe swap?

Diameter difference +1.31%: within the ±3% guideline

By overall diameter alone, 235/45R19 falls inside the ±3% range commonly used as a guideline when replacing 225/45R19. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 225/45R19 (26.97 in) vs 235/45R19 (27.33 in)225/45R1926.97 in × 8.86 in235/45R1927.33 in × 9.25 in
Side profile and tread width, drawn to the same scale.
225/45R19 vs 235/45R19 differences
Measurement225/45R19235/45R19Difference% diff
Overall diameter26.97 in (685.1 mm)27.33 in (694.1 mm)+0.35 in (+9.0 mm)+1.31%
Sidewall height3.99 in (101.3 mm)4.16 in (105.8 mm)+0.18 in (+4.5 mm)+4.44%
Section width8.86 in (225.0 mm)9.25 in (235.0 mm)+0.39 in (+10.0 mm)+4.44%
Circumference84.74 in (2,152.3 mm)85.85 in (2,180.6 mm)+1.11 in (+28.3 mm)+1.31%
Revolutions per mile748738−10−1.30%
True speed with the speedometer calibrated for 225/45R19
IndicatedActual on 225/45R19Actual on 235/45R19Difference
30 mph30.0 mph30.4 mph+0.4 mph
60 mph60.0 mph60.8 mph+0.8 mph
75 mph75.0 mph76.0 mph+1.0 mph

Ride-height change: 235/45R19 raises the vehicle by 0.18 in (4.5 mm) at the axle (half the +9.0 mm diameter difference).

235/45R19 is 0.35 in taller than 225/45R19 and 10 mm wider, a 1.31% difference in overall diameter.

With the speedometer calibrated for 225/45R19, an indicated 60 mph is actually 60.8 mph on 235/45R19, and revolutions per mile change from 748 to 738.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 225/45R19

Other comparisons with 235/45R19

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