TireSizesFinder

265/50R20 vs 305/35R22

305/35R22 is 0.03 in (0.7 mm) shorter than 265/50R20, a −0.09% diameter difference. With the speedometer set for 265/50R20, an indicated 60 mph is 59.9 mph on 305/35R22.

Is this a safe swap?

Diameter difference −0.09%: under 1%

By overall diameter alone, 305/35R22 is a near match for 265/50R20; 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: 265/50R20 (30.43 in) vs 305/35R22 (30.41 in)265/50R2030.43 in × 10.43 in305/35R2230.41 in × 12.01 in
Side profile and tread width, drawn to the same scale.
265/50R20 vs 305/35R22 differences
Measurement265/50R20305/35R22Difference% diff
Overall diameter30.43 in (773.0 mm)30.41 in (772.3 mm)−0.03 in (−0.7 mm)−0.09%
Sidewall height5.22 in (132.5 mm)4.20 in (106.8 mm)−1.01 in (−25.7 mm)−19.43%
Section width10.43 in (265.0 mm)12.01 in (305.0 mm)+1.57 in (+40.0 mm)+15.09%
Circumference95.61 in (2,428.5 mm)95.52 in (2,426.3 mm)−0.09 in (−2.2 mm)−0.09%
Revolutions per mile663663+1+0.09%
True speed with the speedometer calibrated for 265/50R20
IndicatedActual on 265/50R20Actual on 305/35R22Difference
30 mph30.0 mph30.0 mph0.0 mph
60 mph60.0 mph59.9 mph−0.1 mph
75 mph75.0 mph74.9 mph−0.1 mph

Ride-height change: 305/35R22 lowers the vehicle by 0.01 in (0.4 mm) at the axle (half the −0.7 mm diameter difference).

305/35R22 is 0.03 in shorter than 265/50R20 and 40 mm wider, a 0.09% difference in overall diameter.

With the speedometer calibrated for 265/50R20, an indicated 60 mph is actually 59.9 mph on 305/35R22, and revolutions per mile change from 663 to 663.

305/35R22 mounts on a 22-inch wheel, a plus-2 fitment from the 20-inch wheel of 265/50R20.

Size pages

Other comparisons with 265/50R20

Other comparisons with 305/35R22

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