265/45R22 vs 285/30R24

285/30R24 is 0.66 in (16.7 mm) shorter than 265/45R22, a −2.09% diameter difference. With the speedometer set for 265/45R22, an indicated 60 mph is 58.7 mph on 285/30R24.

Is this a safe swap?

Diameter difference −2.09%: within the ±3% guideline

By overall diameter alone, 285/30R24 falls inside the ±3% range commonly used as a guideline when replacing 265/45R22. 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.

265/45R22 vs 285/30R24 differences
Measurement	265/45R22	285/30R24	Difference	% diff
Overall diameter	31.39 in (797.3 mm)	30.73 in (780.6 mm)	−0.66 in (−16.7 mm)	−2.09%
Sidewall height	4.69 in (119.3 mm)	3.37 in (85.5 mm)	−1.33 in (−33.7 mm)	−28.30%
Section width	10.43 in (265.0 mm)	11.22 in (285.0 mm)	+0.79 in (+20.0 mm)	+7.55%
Circumference	98.61 in (2,504.8 mm)	96.55 in (2,452.3 mm)	−2.07 in (−52.5 mm)	−2.09%
Revolutions per mile	643	656	+14	+2.14%

True speed with the speedometer calibrated for 265/45R22
Indicated	Actual on 265/45R22	Actual on 285/30R24	Difference
30 mph	30.0 mph	29.4 mph	−0.6 mph
60 mph	60.0 mph	58.7 mph	−1.3 mph
75 mph	75.0 mph	73.4 mph	−1.6 mph

Ride-height change: 285/30R24 lowers the vehicle by 0.33 in (8.4 mm) at the axle (half the −16.7 mm diameter difference).

285/30R24 is 0.66 in shorter than 265/45R22 and 20 mm wider, a 2.09% difference in overall diameter.

With the speedometer calibrated for 265/45R22, an indicated 60 mph is actually 58.7 mph on 285/30R24, and revolutions per mile change from 643 to 656.

285/30R24 mounts on a 24-inch wheel, a plus-2 fitment from the 22-inch wheel of 265/45R22.

Size pages

Other comparisons with 265/45R22

Other comparisons with 285/30R24

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