TireSizesFinder

245/75R15 vs 225/75R16

225/75R16 is 0.18 in (4.6 mm) shorter than 245/75R15, a −0.61% diameter difference. With the speedometer set for 245/75R15, an indicated 60 mph is 59.6 mph on 225/75R16.

Is this a safe swap?

Diameter difference −0.61%: under 1%

By overall diameter alone, 225/75R16 is a near match for 245/75R15; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 245/75R15 (29.47 in) vs 225/75R16 (29.29 in)245/75R1529.47 in × 9.65 in225/75R1629.29 in × 8.86 in
Side profile and tread width, drawn to the same scale.
245/75R15 vs 225/75R16 differences
Measurement245/75R15225/75R16Difference% diff
Overall diameter29.47 in (748.5 mm)29.29 in (743.9 mm)−0.18 in (−4.6 mm)−0.61%
Sidewall height7.23 in (183.8 mm)6.64 in (168.8 mm)−0.59 in (−15.0 mm)−8.16%
Section width9.65 in (245.0 mm)8.86 in (225.0 mm)−0.79 in (−20.0 mm)−8.16%
Circumference92.58 in (2,351.5 mm)92.01 in (2,337.0 mm)−0.57 in (−14.5 mm)−0.61%
Revolutions per mile684689+4+0.62%
True speed with the speedometer calibrated for 245/75R15
IndicatedActual on 245/75R15Actual on 225/75R16Difference
30 mph30.0 mph29.8 mph−0.2 mph
60 mph60.0 mph59.6 mph−0.4 mph
75 mph75.0 mph74.5 mph−0.5 mph

Ride-height change: 225/75R16 lowers the vehicle by 0.09 in (2.3 mm) at the axle (half the −4.6 mm diameter difference).

225/75R16 is 0.18 in shorter than 245/75R15 and 20 mm narrower, a 0.61% difference in overall diameter.

With the speedometer calibrated for 245/75R15, an indicated 60 mph is actually 59.6 mph on 225/75R16, and revolutions per mile change from 684 to 689.

225/75R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 245/75R15.

Size pages

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Other comparisons with 225/75R16

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