TireSizesFinder

215/75R14 vs 225/65R15

225/65R15 is 0.18 in (4.6 mm) shorter than 215/75R14, a −0.68% diameter difference. With the speedometer set for 215/75R14, an indicated 60 mph is 59.6 mph on 225/65R15.

Is this a safe swap?

Diameter difference −0.68%: under 1%

By overall diameter alone, 225/65R15 is a near match for 215/75R14; 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: 215/75R14 (26.70 in) vs 225/65R15 (26.52 in)215/75R1426.70 in × 8.46 in225/65R1526.52 in × 8.86 in
Side profile and tread width, drawn to the same scale.
215/75R14 vs 225/65R15 differences
Measurement215/75R14225/65R15Difference% diff
Overall diameter26.70 in (678.1 mm)26.52 in (673.5 mm)−0.18 in (−4.6 mm)−0.68%
Sidewall height6.35 in (161.3 mm)5.76 in (146.3 mm)−0.59 in (−15.0 mm)−9.30%
Section width8.46 in (215.0 mm)8.86 in (225.0 mm)+0.39 in (+10.0 mm)+4.65%
Circumference83.87 in (2,130.3 mm)83.30 in (2,115.9 mm)−0.57 in (−14.5 mm)−0.68%
Revolutions per mile755761+5+0.68%
True speed with the speedometer calibrated for 215/75R14
IndicatedActual on 215/75R14Actual on 225/65R15Difference
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: 225/65R15 lowers the vehicle by 0.09 in (2.3 mm) at the axle (half the −4.6 mm diameter difference).

225/65R15 is 0.18 in shorter than 215/75R14 and 10 mm wider, a 0.68% difference in overall diameter.

With the speedometer calibrated for 215/75R14, an indicated 60 mph is actually 59.6 mph on 225/65R15, and revolutions per mile change from 755 to 761.

225/65R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 215/75R14.

Size pages

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