245/50R20 vs 265/35R22

265/35R22 is 0.34 in (8.7 mm) shorter than 245/50R20, a −1.16% diameter difference. With the speedometer set for 245/50R20, an indicated 60 mph is 59.3 mph on 265/35R22.

Is this a safe swap?

Diameter difference −1.16%: within the ±3% guideline

By overall diameter alone, 265/35R22 falls inside the ±3% range commonly used as a guideline when replacing 245/50R20. 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.

245/50R20 vs 265/35R22 differences
Measurement	245/50R20	265/35R22	Difference	% diff
Overall diameter	29.65 in (753.0 mm)	29.30 in (744.3 mm)	−0.34 in (−8.7 mm)	−1.16%
Sidewall height	4.82 in (122.5 mm)	3.65 in (92.8 mm)	−1.17 in (−29.7 mm)	−24.29%
Section width	9.65 in (245.0 mm)	10.43 in (265.0 mm)	+0.79 in (+20.0 mm)	+8.16%
Circumference	93.13 in (2,365.6 mm)	92.06 in (2,338.3 mm)	−1.08 in (−27.3 mm)	−1.16%
Revolutions per mile	680	688	+8	+1.17%

True speed with the speedometer calibrated for 245/50R20
Indicated	Actual on 245/50R20	Actual on 265/35R22	Difference
30 mph	30.0 mph	29.7 mph	−0.3 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: 265/35R22 lowers the vehicle by 0.17 in (4.4 mm) at the axle (half the −8.7 mm diameter difference).

265/35R22 is 0.34 in shorter than 245/50R20 and 20 mm wider, a 1.16% difference in overall diameter.

With the speedometer calibrated for 245/50R20, an indicated 60 mph is actually 59.3 mph on 265/35R22, and revolutions per mile change from 680 to 688.

265/35R22 mounts on a 22-inch wheel, a plus-2 fitment from the 20-inch wheel of 245/50R20.

Size pages

Other comparisons with 245/50R20

Other comparisons with 265/35R22

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