TireSizesFinder

245/30R19 vs 225/35R19

225/35R19 is 0.41 in (10.5 mm) taller than 245/30R19, a +1.67% diameter difference. With the speedometer set for 245/30R19, an indicated 60 mph is 61.0 mph on 225/35R19.

Is this a safe swap?

Diameter difference +1.67%: within the ±3% guideline

By overall diameter alone, 225/35R19 falls inside the ±3% range commonly used as a guideline when replacing 245/30R19. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 245/30R19 (24.79 in) vs 225/35R19 (25.20 in)245/30R1924.79 in × 9.65 in225/35R1925.20 in × 8.86 in
Side profile and tread width, drawn to the same scale.
245/30R19 vs 225/35R19 differences
Measurement245/30R19225/35R19Difference% diff
Overall diameter24.79 in (629.6 mm)25.20 in (640.1 mm)+0.41 in (+10.5 mm)+1.67%
Sidewall height2.89 in (73.5 mm)3.10 in (78.8 mm)+0.21 in (+5.3 mm)+7.14%
Section width9.65 in (245.0 mm)8.86 in (225.0 mm)−0.79 in (−20.0 mm)−8.16%
Circumference77.87 in (1,977.9 mm)79.17 in (2,010.9 mm)+1.30 in (+33.0 mm)+1.67%
Revolutions per mile814800−13−1.64%
True speed with the speedometer calibrated for 245/30R19
IndicatedActual on 245/30R19Actual on 225/35R19Difference
30 mph30.0 mph30.5 mph+0.5 mph
60 mph60.0 mph61.0 mph+1.0 mph
75 mph75.0 mph76.3 mph+1.3 mph

Ride-height change: 225/35R19 raises the vehicle by 0.21 in (5.3 mm) at the axle (half the +10.5 mm diameter difference).

225/35R19 is 0.41 in taller than 245/30R19 and 20 mm narrower, a 1.67% difference in overall diameter.

With the speedometer calibrated for 245/30R19, an indicated 60 mph is actually 61.0 mph on 225/35R19, and revolutions per mile change from 814 to 800.

Both sizes mount on 19-inch wheels.

Size pages

Other comparisons with 245/30R19

Other comparisons with 225/35R19

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