295/35R20 vs 245/30R22

245/30R22 is 0.34 in (8.7 mm) shorter than 295/35R20, a −1.22% diameter difference. With the speedometer set for 295/35R20, an indicated 60 mph is 59.3 mph on 245/30R22.

Is this a safe swap?

Diameter difference −1.22%: within the ±3% guideline

By overall diameter alone, 245/30R22 falls inside the ±3% range commonly used as a guideline when replacing 295/35R20. 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.

295/35R20 vs 245/30R22 differences
Measurement	295/35R20	245/30R22	Difference	% diff
Overall diameter	28.13 in (714.5 mm)	27.79 in (705.8 mm)	−0.34 in (−8.7 mm)	−1.22%
Sidewall height	4.06 in (103.3 mm)	2.89 in (73.5 mm)	−1.17 in (−29.7 mm)	−28.81%
Section width	11.61 in (295.0 mm)	9.65 in (245.0 mm)	−1.97 in (−50.0 mm)	−16.95%
Circumference	88.37 in (2,244.7 mm)	87.30 in (2,217.3 mm)	−1.08 in (−27.3 mm)	−1.22%
Revolutions per mile	717	726	+9	+1.23%

True speed with the speedometer calibrated for 295/35R20
Indicated	Actual on 295/35R20	Actual on 245/30R22	Difference
30 mph	30.0 mph	29.6 mph	−0.4 mph
60 mph	60.0 mph	59.3 mph	−0.7 mph
75 mph	75.0 mph	74.1 mph	−0.9 mph

Ride-height change: 245/30R22 lowers the vehicle by 0.17 in (4.4 mm) at the axle (half the −8.7 mm diameter difference).

245/30R22 is 0.34 in shorter than 295/35R20 and 50 mm narrower, a 1.22% difference in overall diameter.

With the speedometer calibrated for 295/35R20, an indicated 60 mph is actually 59.3 mph on 245/30R22, and revolutions per mile change from 717 to 726.

245/30R22 mounts on a 22-inch wheel, a plus-2 fitment from the 20-inch wheel of 295/35R20.

Size pages

Other comparisons with 295/35R20

Other comparisons with 245/30R22

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