245/30R22 vs 265/30R22

265/30R22 is 0.47 in (12.0 mm) taller than 245/30R22, a +1.70% diameter difference. With the speedometer set for 245/30R22, an indicated 60 mph is 61.0 mph on 265/30R22.

Is this a safe swap?

Diameter difference +1.70%: within the ±3% guideline

By overall diameter alone, 265/30R22 falls inside the ±3% range commonly used as a guideline when replacing 245/30R22. 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.

245/30R22 vs 265/30R22 differences
Measurement	245/30R22	265/30R22	Difference	% diff
Overall diameter	27.79 in (705.8 mm)	28.26 in (717.8 mm)	+0.47 in (+12.0 mm)	+1.70%
Sidewall height	2.89 in (73.5 mm)	3.13 in (79.5 mm)	+0.24 in (+6.0 mm)	+8.16%
Section width	9.65 in (245.0 mm)	10.43 in (265.0 mm)	+0.79 in (+20.0 mm)	+8.16%
Circumference	87.30 in (2,217.3 mm)	88.78 in (2,255.0 mm)	+1.48 in (+37.7 mm)	+1.70%
Revolutions per mile	726	714	−12	−1.67%

True speed with the speedometer calibrated for 245/30R22
Indicated	Actual on 245/30R22	Actual on 265/30R22	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	76.3 mph	+1.3 mph

Ride-height change: 265/30R22 raises the vehicle by 0.24 in (6.0 mm) at the axle (half the +12.0 mm diameter difference).

265/30R22 is 0.47 in taller than 245/30R22 and 20 mm wider, a 1.70% difference in overall diameter.

With the speedometer calibrated for 245/30R22, an indicated 60 mph is actually 61.0 mph on 265/30R22, and revolutions per mile change from 726 to 714.

Both sizes mount on 22-inch wheels.

Size pages

Other comparisons with 245/30R22

Other comparisons with 265/30R22

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