245/40R20 vs 295/25R22

295/25R22 is 0.09 in (2.3 mm) taller than 245/40R20, a +0.33% diameter difference. With the speedometer set for 245/40R20, an indicated 60 mph is 60.2 mph on 295/25R22.

Is this a safe swap?

Diameter difference +0.33%: under 1%

By overall diameter alone, 295/25R22 is a near match for 245/40R20; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

Side profile and tread width, drawn to the same scale.

245/40R20 vs 295/25R22 differences
Measurement	245/40R20	295/25R22	Difference	% diff
Overall diameter	27.72 in (704.0 mm)	27.81 in (706.3 mm)	+0.09 in (+2.3 mm)	+0.33%
Sidewall height	3.86 in (98.0 mm)	2.90 in (73.8 mm)	−0.95 in (−24.2 mm)	−24.74%
Section width	9.65 in (245.0 mm)	11.61 in (295.0 mm)	+1.97 in (+50.0 mm)	+20.41%
Circumference	87.07 in (2,211.7 mm)	87.36 in (2,218.9 mm)	+0.28 in (+7.2 mm)	+0.33%
Revolutions per mile	728	725	−2	−0.33%

True speed with the speedometer calibrated for 245/40R20
Indicated	Actual on 245/40R20	Actual on 295/25R22	Difference
30 mph	30.0 mph	30.1 mph	+0.1 mph
60 mph	60.0 mph	60.2 mph	+0.2 mph
75 mph	75.0 mph	75.2 mph	+0.2 mph

Ride-height change: 295/25R22 raises the vehicle by 0.05 in (1.1 mm) at the axle (half the +2.3 mm diameter difference).

295/25R22 is 0.09 in taller than 245/40R20 and 50 mm wider, a 0.33% difference in overall diameter.

With the speedometer calibrated for 245/40R20, an indicated 60 mph is actually 60.2 mph on 295/25R22, and revolutions per mile change from 728 to 725.

295/25R22 mounts on a 22-inch wheel, a plus-2 fitment from the 20-inch wheel of 245/40R20.

Size pages

Other comparisons with 245/40R20

Other comparisons with 295/25R22

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.