265/45R20 vs 265/35R22

265/35R22 is 0.09 in (2.2 mm) shorter than 265/45R20, a −0.29% diameter difference. With the speedometer set for 265/45R20, an indicated 60 mph is 59.8 mph on 265/35R22.

Is this a safe swap?

Diameter difference −0.29%: under 1%

By overall diameter alone, 265/35R22 is a near match for 265/45R20; 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.

265/45R20 vs 265/35R22 differences
Measurement	265/45R20	265/35R22	Difference	% diff
Overall diameter	29.39 in (746.5 mm)	29.30 in (744.3 mm)	−0.09 in (−2.2 mm)	−0.29%
Sidewall height	4.69 in (119.3 mm)	3.65 in (92.8 mm)	−1.04 in (−26.5 mm)	−22.22%
Section width	10.43 in (265.0 mm)	10.43 in (265.0 mm)	0.00 in (0.0 mm)	0.00%
Circumference	92.33 in (2,345.2 mm)	92.06 in (2,338.3 mm)	−0.27 in (−6.9 mm)	−0.29%
Revolutions per mile	686	688	+2	+0.30%

True speed with the speedometer calibrated for 265/45R20
Indicated	Actual on 265/45R20	Actual on 265/35R22	Difference
30 mph	30.0 mph	29.9 mph	−0.1 mph
60 mph	60.0 mph	59.8 mph	−0.2 mph
75 mph	75.0 mph	74.8 mph	−0.2 mph

Ride-height change: 265/35R22 lowers the vehicle by 0.04 in (1.1 mm) at the axle (half the −2.2 mm diameter difference).

265/35R22 is 0.09 in shorter than 265/45R20 and the same width, a 0.29% difference in overall diameter.

With the speedometer calibrated for 265/45R20, an indicated 60 mph is actually 59.8 mph on 265/35R22, and revolutions per mile change from 686 to 688.

265/35R22 mounts on a 22-inch wheel, a plus-2 fitment from the 20-inch wheel of 265/45R20.

Size pages

Other comparisons with 265/45R20

Other comparisons with 265/35R22

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