295/30R22 vs 255/35R22

255/35R22 is 0.06 in (1.5 mm) taller than 295/30R22, a +0.20% diameter difference. With the speedometer set for 295/30R22, an indicated 60 mph is 60.1 mph on 255/35R22.

Is this a safe swap?

Diameter difference +0.20%: under 1%

By overall diameter alone, 255/35R22 is a near match for 295/30R22; the speedometer changes by less than 1%. 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.

295/30R22 vs 255/35R22 differences
Measurement	295/30R22	255/35R22	Difference	% diff
Overall diameter	28.97 in (735.8 mm)	29.03 in (737.3 mm)	+0.06 in (+1.5 mm)	+0.20%
Sidewall height	3.48 in (88.5 mm)	3.51 in (89.3 mm)	+0.03 in (+0.8 mm)	+0.85%
Section width	11.61 in (295.0 mm)	10.04 in (255.0 mm)	−1.57 in (−40.0 mm)	−13.56%
Circumference	91.01 in (2,311.6 mm)	91.19 in (2,316.3 mm)	+0.19 in (+4.7 mm)	+0.20%
Revolutions per mile	696	695	−1	−0.20%

True speed with the speedometer calibrated for 295/30R22
Indicated	Actual on 295/30R22	Actual on 255/35R22	Difference
30 mph	30.0 mph	30.1 mph	+0.1 mph
60 mph	60.0 mph	60.1 mph	+0.1 mph
75 mph	75.0 mph	75.2 mph	+0.2 mph

Ride-height change: 255/35R22 raises the vehicle by 0.03 in (0.8 mm) at the axle (half the +1.5 mm diameter difference).

255/35R22 is 0.06 in taller than 295/30R22 and 40 mm narrower, a 0.20% difference in overall diameter.

With the speedometer calibrated for 295/30R22, an indicated 60 mph is actually 60.1 mph on 255/35R22, and revolutions per mile change from 696 to 695.

Both sizes mount on 22-inch wheels.

Size pages

Other comparisons with 295/30R22

Other comparisons with 255/35R22

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