TireSizesFinder

225/75R14 vs 215/70R15

215/70R15 is 0.44 in (11.1 mm) shorter than 225/75R14, a −1.60% diameter difference. With the speedometer set for 225/75R14, an indicated 60 mph is 59.0 mph on 215/70R15.

Is this a safe swap?

Diameter difference −1.60%: within the ±3% guideline

By overall diameter alone, 215/70R15 falls inside the ±3% range commonly used as a guideline when replacing 225/75R14. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 225/75R14 (27.29 in) vs 215/70R15 (26.85 in)225/75R1427.29 in × 8.86 in215/70R1526.85 in × 8.46 in
Side profile and tread width, drawn to the same scale.
225/75R14 vs 215/70R15 differences
Measurement225/75R14215/70R15Difference% diff
Overall diameter27.29 in (693.1 mm)26.85 in (682.0 mm)−0.44 in (−11.1 mm)−1.60%
Sidewall height6.64 in (168.8 mm)5.93 in (150.5 mm)−0.72 in (−18.2 mm)−10.81%
Section width8.86 in (225.0 mm)8.46 in (215.0 mm)−0.39 in (−10.0 mm)−4.44%
Circumference85.73 in (2,177.4 mm)84.35 in (2,142.6 mm)−1.37 in (−34.9 mm)−1.60%
Revolutions per mile739751+12+1.63%
True speed with the speedometer calibrated for 225/75R14
IndicatedActual on 225/75R14Actual on 215/70R15Difference
30 mph30.0 mph29.5 mph−0.5 mph
60 mph60.0 mph59.0 mph−1.0 mph
75 mph75.0 mph73.8 mph−1.2 mph

Ride-height change: 215/70R15 lowers the vehicle by 0.22 in (5.5 mm) at the axle (half the −11.1 mm diameter difference).

215/70R15 is 0.44 in shorter than 225/75R14 and 10 mm narrower, a 1.60% difference in overall diameter.

With the speedometer calibrated for 225/75R14, an indicated 60 mph is actually 59.0 mph on 215/70R15, and revolutions per mile change from 739 to 751.

215/70R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 225/75R14.

Size pages

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