275/30R21 vs 295/25R22

295/25R22 is 0.31 in (7.9 mm) taller than 275/30R21, a +1.13% diameter difference. With the speedometer set for 275/30R21, an indicated 60 mph is 60.7 mph on 295/25R22.

Is this a safe swap?

Diameter difference +1.13%: within the ±3% guideline

By overall diameter alone, 295/25R22 falls inside the ±3% range commonly used as a guideline when replacing 275/30R21. 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.

275/30R21 vs 295/25R22 differences
Measurement	275/30R21	295/25R22	Difference	% diff
Overall diameter	27.50 in (698.4 mm)	27.81 in (706.3 mm)	+0.31 in (+7.9 mm)	+1.13%
Sidewall height	3.25 in (82.5 mm)	2.90 in (73.8 mm)	−0.34 in (−8.7 mm)	−10.61%
Section width	10.83 in (275.0 mm)	11.61 in (295.0 mm)	+0.79 in (+20.0 mm)	+7.27%
Circumference	86.38 in (2,194.1 mm)	87.36 in (2,218.9 mm)	+0.98 in (+24.8 mm)	+1.13%
Revolutions per mile	733	725	−8	−1.12%

True speed with the speedometer calibrated for 275/30R21
Indicated	Actual on 275/30R21	Actual on 295/25R22	Difference
30 mph	30.0 mph	30.3 mph	+0.3 mph
60 mph	60.0 mph	60.7 mph	+0.7 mph
75 mph	75.0 mph	75.8 mph	+0.8 mph

Ride-height change: 295/25R22 raises the vehicle by 0.16 in (3.9 mm) at the axle (half the +7.9 mm diameter difference).

295/25R22 is 0.31 in taller than 275/30R21 and 20 mm wider, a 1.13% difference in overall diameter.

With the speedometer calibrated for 275/30R21, an indicated 60 mph is actually 60.7 mph on 295/25R22, and revolutions per mile change from 733 to 725.

295/25R22 mounts on a 22-inch wheel, a plus-1 fitment from the 21-inch wheel of 275/30R21.

Size pages

Other comparisons with 275/30R21

Other comparisons with 295/25R22

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