TireSizesFinder

33x12.50R22 vs 305/35R24

305/35R24 is 0.59 in (15.1 mm) shorter than 33x12.50R22, a −1.80% diameter difference. With the speedometer set for 33x12.50R22, an indicated 60 mph is 58.9 mph on 305/35R24.

Is this a safe swap?

Diameter difference −1.80%: within the ±3% guideline

By overall diameter alone, 305/35R24 falls inside the ±3% range commonly used as a guideline when replacing 33x12.50R22. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 33x12.50R22 (33.00 in) vs 305/35R24 (32.41 in)33x12.50R2233.00 in × 12.50 in305/35R2432.41 in × 12.01 in
Side profile and tread width, drawn to the same scale.
33x12.50R22 vs 305/35R24 differences
Measurement33x12.50R22305/35R24Difference% diff
Overall diameter33.00 in (838.2 mm)32.41 in (823.1 mm)−0.59 in (−15.1 mm)−1.80%
Sidewall height5.50 in (139.7 mm)4.20 in (106.8 mm)−1.30 in (−32.9 mm)−23.59%
Section width12.50 in (317.5 mm)12.01 in (305.0 mm)−0.49 in (−12.5 mm)−3.94%
Circumference103.67 in (2,633.3 mm)101.80 in (2,585.8 mm)−1.87 in (−47.4 mm)−1.80%
Revolutions per mile611622+11+1.83%
True speed with the speedometer calibrated for 33x12.50R22
IndicatedActual on 33x12.50R22Actual on 305/35R24Difference
30 mph30.0 mph29.5 mph−0.5 mph
60 mph60.0 mph58.9 mph−1.1 mph
75 mph75.0 mph73.6 mph−1.4 mph

Ride-height change: 305/35R24 lowers the vehicle by 0.30 in (7.6 mm) at the axle (half the −15.1 mm diameter difference).

305/35R24 is 0.59 in shorter than 33x12.50R22 and 13 mm narrower, a 1.80% difference in overall diameter.

With the speedometer calibrated for 33x12.50R22, an indicated 60 mph is actually 58.9 mph on 305/35R24, and revolutions per mile change from 611 to 622.

305/35R24 mounts on a 24-inch wheel, a plus-2 fitment from the 22-inch wheel of 33x12.50R22.

Size pages

Other comparisons with 33x12.50R22

Other comparisons with 305/35R24

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