TireSizesFinder

295/40R22 vs 285/30R24

285/30R24 is 0.56 in (14.2 mm) shorter than 295/40R22, a −1.79% diameter difference. With the speedometer set for 295/40R22, an indicated 60 mph is 58.9 mph on 285/30R24.

Is this a safe swap?

Diameter difference −1.79%: within the ±3% guideline

By overall diameter alone, 285/30R24 falls inside the ±3% range commonly used as a guideline when replacing 295/40R22. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 295/40R22 (31.29 in) vs 285/30R24 (30.73 in)295/40R2231.29 in × 11.61 in285/30R2430.73 in × 11.22 in
Side profile and tread width, drawn to the same scale.
295/40R22 vs 285/30R24 differences
Measurement295/40R22285/30R24Difference% diff
Overall diameter31.29 in (794.8 mm)30.73 in (780.6 mm)−0.56 in (−14.2 mm)−1.79%
Sidewall height4.65 in (118.0 mm)3.37 in (85.5 mm)−1.28 in (−32.5 mm)−27.54%
Section width11.61 in (295.0 mm)11.22 in (285.0 mm)−0.39 in (−10.0 mm)−3.39%
Circumference98.30 in (2,496.9 mm)96.55 in (2,452.3 mm)−1.76 in (−44.6 mm)−1.79%
Revolutions per mile645656+12+1.82%
True speed with the speedometer calibrated for 295/40R22
IndicatedActual on 295/40R22Actual on 285/30R24Difference
30 mph30.0 mph29.5 mph−0.5 mph
60 mph60.0 mph58.9 mph−1.1 mph
75 mph75.0 mph73.7 mph−1.3 mph

Ride-height change: 285/30R24 lowers the vehicle by 0.28 in (7.1 mm) at the axle (half the −14.2 mm diameter difference).

285/30R24 is 0.56 in shorter than 295/40R22 and 10 mm narrower, a 1.79% difference in overall diameter.

With the speedometer calibrated for 295/40R22, an indicated 60 mph is actually 58.9 mph on 285/30R24, and revolutions per mile change from 645 to 656.

285/30R24 mounts on a 24-inch wheel, a plus-2 fitment from the 22-inch wheel of 295/40R22.

Size pages

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Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.