TireSizesFinder

305/35R22 vs 275/25R24

275/25R24 is 0.99 in (25.2 mm) shorter than 305/35R22, a −3.26% diameter difference. With the speedometer set for 305/35R22, an indicated 60 mph is 58.0 mph on 275/25R24.

Is this a safe swap?

Diameter difference −3.26%: outside the ±3% guideline

By overall diameter alone, 275/25R24 falls outside the ±3% range commonly used as a guideline when replacing 305/35R22; speedometer and ride-height changes are larger. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 305/35R22 (30.41 in) vs 275/25R24 (29.41 in)305/35R2230.41 in × 12.01 in275/25R2429.41 in × 10.83 in
Side profile and tread width, drawn to the same scale.
305/35R22 vs 275/25R24 differences
Measurement305/35R22275/25R24Difference% diff
Overall diameter30.41 in (772.3 mm)29.41 in (747.1 mm)−0.99 in (−25.2 mm)−3.26%
Sidewall height4.20 in (106.8 mm)2.71 in (68.8 mm)−1.50 in (−38.0 mm)−35.60%
Section width12.01 in (305.0 mm)10.83 in (275.0 mm)−1.18 in (−30.0 mm)−9.84%
Circumference95.52 in (2,426.3 mm)92.40 in (2,347.1 mm)−3.12 in (−79.2 mm)−3.26%
Revolutions per mile663686+22+3.37%
True speed with the speedometer calibrated for 305/35R22
IndicatedActual on 305/35R22Actual on 275/25R24Difference
30 mph30.0 mph29.0 mph−1.0 mph
60 mph60.0 mph58.0 mph−2.0 mph
75 mph75.0 mph72.6 mph−2.4 mph

Ride-height change: 275/25R24 lowers the vehicle by 0.50 in (12.6 mm) at the axle (half the −25.2 mm diameter difference).

275/25R24 is 0.99 in shorter than 305/35R22 and 30 mm narrower, a 3.26% difference in overall diameter.

With the speedometer calibrated for 305/35R22, an indicated 60 mph is actually 58.0 mph on 275/25R24, and revolutions per mile change from 663 to 686.

275/25R24 mounts on a 24-inch wheel, a plus-2 fitment from the 22-inch wheel of 305/35R22.

Size pages

Other comparisons with 305/35R22

Other comparisons with 275/25R24

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