255/35R22 vs 275/25R24

275/25R24 is 0.39 in (9.8 mm) taller than 255/35R22, a +1.33% diameter difference. With the speedometer set for 255/35R22, an indicated 60 mph is 60.8 mph on 275/25R24.

Is this a safe swap?

Diameter difference +1.33%: within the ±3% guideline

By overall diameter alone, 275/25R24 falls inside the ±3% range commonly used as a guideline when replacing 255/35R22. 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.

255/35R22 vs 275/25R24 differences
Measurement	255/35R22	275/25R24	Difference	% diff
Overall diameter	29.03 in (737.3 mm)	29.41 in (747.1 mm)	+0.39 in (+9.8 mm)	+1.33%
Sidewall height	3.51 in (89.3 mm)	2.71 in (68.8 mm)	−0.81 in (−20.5 mm)	−22.97%
Section width	10.04 in (255.0 mm)	10.83 in (275.0 mm)	+0.79 in (+20.0 mm)	+7.84%
Circumference	91.19 in (2,316.3 mm)	92.40 in (2,347.1 mm)	+1.21 in (+30.8 mm)	+1.33%
Revolutions per mile	695	686	−9	−1.31%

True speed with the speedometer calibrated for 255/35R22
Indicated	Actual on 255/35R22	Actual on 275/25R24	Difference
30 mph	30.0 mph	30.4 mph	+0.4 mph
60 mph	60.0 mph	60.8 mph	+0.8 mph
75 mph	75.0 mph	76.0 mph	+1.0 mph

Ride-height change: 275/25R24 raises the vehicle by 0.19 in (4.9 mm) at the axle (half the +9.8 mm diameter difference).

275/25R24 is 0.39 in taller than 255/35R22 and 20 mm wider, a 1.33% difference in overall diameter.

With the speedometer calibrated for 255/35R22, an indicated 60 mph is actually 60.8 mph on 275/25R24, and revolutions per mile change from 695 to 686.

275/25R24 mounts on a 24-inch wheel, a plus-2 fitment from the 22-inch wheel of 255/35R22.

Size pages

Other comparisons with 255/35R22

Other comparisons with 275/25R24

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