TireSizesFinder

295/35R19 vs 225/40R20

225/40R20 is 0.04 in (1.1 mm) shorter than 295/35R19, a −0.16% diameter difference. With the speedometer set for 295/35R19, an indicated 60 mph is 59.9 mph on 225/40R20.

Is this a safe swap?

Diameter difference −0.16%: under 1%

By overall diameter alone, 225/40R20 is a near match for 295/35R19; 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: 295/35R19 (27.13 in) vs 225/40R20 (27.09 in)295/35R1927.13 in × 11.61 in225/40R2027.09 in × 8.86 in
Side profile and tread width, drawn to the same scale.
295/35R19 vs 225/40R20 differences
Measurement295/35R19225/40R20Difference% diff
Overall diameter27.13 in (689.1 mm)27.09 in (688.0 mm)−0.04 in (−1.1 mm)−0.16%
Sidewall height4.06 in (103.3 mm)3.54 in (90.0 mm)−0.52 in (−13.2 mm)−12.83%
Section width11.61 in (295.0 mm)8.86 in (225.0 mm)−2.76 in (−70.0 mm)−23.73%
Circumference85.23 in (2,164.9 mm)85.10 in (2,161.4 mm)−0.14 in (−3.5 mm)−0.16%
Revolutions per mile743745+1+0.16%
True speed with the speedometer calibrated for 295/35R19
IndicatedActual on 295/35R19Actual on 225/40R20Difference
30 mph30.0 mph30.0 mph0.0 mph
60 mph60.0 mph59.9 mph−0.1 mph
75 mph75.0 mph74.9 mph−0.1 mph

Ride-height change: 225/40R20 lowers the vehicle by 0.02 in (0.5 mm) at the axle (half the −1.1 mm diameter difference).

225/40R20 is 0.04 in shorter than 295/35R19 and 70 mm narrower, a 0.16% difference in overall diameter.

With the speedometer calibrated for 295/35R19, an indicated 60 mph is actually 59.9 mph on 225/40R20, and revolutions per mile change from 743 to 745.

225/40R20 mounts on a 20-inch wheel, a plus-1 fitment from the 19-inch wheel of 295/35R19.

Size pages

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