TireSizesFinder

225/45R19 vs 295/30R20

295/30R20 is 0.00 in (0.1 mm) shorter than 225/45R19, a −0.01% diameter difference. With the speedometer set for 225/45R19, an indicated 60 mph is 60.0 mph on 295/30R20.

Is this a safe swap?

Diameter difference −0.01%: under 1%

By overall diameter alone, 295/30R20 is a near match for 225/45R19; 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: 225/45R19 (26.97 in) vs 295/30R20 (26.97 in)225/45R1926.97 in × 8.86 in295/30R2026.97 in × 11.61 in
Side profile and tread width, drawn to the same scale.
225/45R19 vs 295/30R20 differences
Measurement225/45R19295/30R20Difference% diff
Overall diameter26.97 in (685.1 mm)26.97 in (685.0 mm)0.00 in (−0.1 mm)−0.01%
Sidewall height3.99 in (101.3 mm)3.48 in (88.5 mm)−0.50 in (−12.7 mm)−12.59%
Section width8.86 in (225.0 mm)11.61 in (295.0 mm)+2.76 in (+70.0 mm)+31.11%
Circumference84.74 in (2,152.3 mm)84.72 in (2,152.0 mm)−0.01 in (−0.3 mm)−0.01%
Revolutions per mile7487480+0.01%
True speed with the speedometer calibrated for 225/45R19
IndicatedActual on 225/45R19Actual on 295/30R20Difference
30 mph30.0 mph30.0 mph0.0 mph
60 mph60.0 mph60.0 mph0.0 mph
75 mph75.0 mph75.0 mph0.0 mph

Ride-height change: 295/30R20 does not change the vehicle at the axle (half the −0.1 mm diameter difference).

295/30R20 is the same height as 225/45R19 and 70 mm wider, a 0.01% difference in overall diameter.

With the speedometer calibrated for 225/45R19, an indicated 60 mph is actually 60.0 mph on 295/30R20, and revolutions per mile change from 748 to 748.

295/30R20 mounts on a 20-inch wheel, a plus-1 fitment from the 19-inch wheel of 225/45R19.

Size pages

Other comparisons with 225/45R19

Other comparisons with 295/30R20

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