295/30R22 vs 315/30R22

315/30R22 is 0.47 in (12.0 mm) taller than 295/30R22, a +1.63% diameter difference. With the speedometer set for 295/30R22, an indicated 60 mph is 61.0 mph on 315/30R22.

Is this a safe swap?

Diameter difference +1.63%: within the ±3% guideline

By overall diameter alone, 315/30R22 falls inside the ±3% range commonly used as a guideline when replacing 295/30R22. 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 315/30R22 differences
Measurement	295/30R22	315/30R22	Difference	% diff
Overall diameter	28.97 in (735.8 mm)	29.44 in (747.8 mm)	+0.47 in (+12.0 mm)	+1.63%
Sidewall height	3.48 in (88.5 mm)	3.72 in (94.5 mm)	+0.24 in (+6.0 mm)	+6.78%
Section width	11.61 in (295.0 mm)	12.40 in (315.0 mm)	+0.79 in (+20.0 mm)	+6.78%
Circumference	91.01 in (2,311.6 mm)	92.49 in (2,349.3 mm)	+1.48 in (+37.7 mm)	+1.63%
Revolutions per mile	696	685	−11	−1.60%

True speed with the speedometer calibrated for 295/30R22
Indicated	Actual on 295/30R22	Actual on 315/30R22	Difference
30 mph	30.0 mph	30.5 mph	+0.5 mph
60 mph	60.0 mph	61.0 mph	+1.0 mph
75 mph	75.0 mph	76.2 mph	+1.2 mph

Ride-height change: 315/30R22 raises the vehicle by 0.24 in (6.0 mm) at the axle (half the +12.0 mm diameter difference).

315/30R22 is 0.47 in taller than 295/30R22 and 20 mm wider, a 1.63% difference in overall diameter.

With the speedometer calibrated for 295/30R22, an indicated 60 mph is actually 61.0 mph on 315/30R22, and revolutions per mile change from 696 to 685.

Both sizes mount on 22-inch wheels.

Size pages

Other comparisons with 295/30R22

Other comparisons with 315/30R22

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