TireSizesFinder

295/30R19 vs 225/35R20

225/35R20 is 0.23 in (5.9 mm) taller than 295/30R19, a +0.89% diameter difference. With the speedometer set for 295/30R19, an indicated 60 mph is 60.5 mph on 225/35R20.

Is this a safe swap?

Diameter difference +0.89%: under 1%

By overall diameter alone, 225/35R20 is a near match for 295/30R19; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 295/30R19 (25.97 in) vs 225/35R20 (26.20 in)295/30R1925.97 in × 11.61 in225/35R2026.20 in × 8.86 in
Side profile and tread width, drawn to the same scale.
295/30R19 vs 225/35R20 differences
Measurement295/30R19225/35R20Difference% diff
Overall diameter25.97 in (659.6 mm)26.20 in (665.5 mm)+0.23 in (+5.9 mm)+0.89%
Sidewall height3.48 in (88.5 mm)3.10 in (78.8 mm)−0.38 in (−9.7 mm)−11.02%
Section width11.61 in (295.0 mm)8.86 in (225.0 mm)−2.76 in (−70.0 mm)−23.73%
Circumference81.58 in (2,072.2 mm)82.31 in (2,090.7 mm)+0.73 in (+18.5 mm)+0.89%
Revolutions per mile777770−7−0.89%
True speed with the speedometer calibrated for 295/30R19
IndicatedActual on 295/30R19Actual on 225/35R20Difference
30 mph30.0 mph30.3 mph+0.3 mph
60 mph60.0 mph60.5 mph+0.5 mph
75 mph75.0 mph75.7 mph+0.7 mph

Ride-height change: 225/35R20 raises the vehicle by 0.12 in (3.0 mm) at the axle (half the +5.9 mm diameter difference).

225/35R20 is 0.23 in taller than 295/30R19 and 70 mm narrower, a 0.89% difference in overall diameter.

With the speedometer calibrated for 295/30R19, an indicated 60 mph is actually 60.5 mph on 225/35R20, and revolutions per mile change from 777 to 770.

225/35R20 mounts on a 20-inch wheel, a plus-1 fitment from the 19-inch wheel of 295/30R19.

Size pages

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