TireSizesFinder

225/75R15 vs 215/65R17

215/65R17 is 0.28 in (7.2 mm) shorter than 225/75R15, a −1.00% diameter difference. With the speedometer set for 225/75R15, an indicated 60 mph is 59.4 mph on 215/65R17.

Is this a safe swap?

Diameter difference −1.00%: within the ±3% guideline

By overall diameter alone, 215/65R17 falls inside the ±3% range commonly used as a guideline when replacing 225/75R15. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 225/75R15 (28.29 in) vs 215/65R17 (28.00 in)225/75R1528.29 in × 8.86 in215/65R1728.00 in × 8.46 in
Side profile and tread width, drawn to the same scale.
225/75R15 vs 215/65R17 differences
Measurement225/75R15215/65R17Difference% diff
Overall diameter28.29 in (718.5 mm)28.00 in (711.3 mm)−0.28 in (−7.2 mm)−1.00%
Sidewall height6.64 in (168.8 mm)5.50 in (139.8 mm)−1.14 in (−29.0 mm)−17.19%
Section width8.86 in (225.0 mm)8.46 in (215.0 mm)−0.39 in (−10.0 mm)−4.44%
Circumference88.87 in (2,257.2 mm)87.98 in (2,234.6 mm)−0.89 in (−22.6 mm)−1.00%
Revolutions per mile713720+7+1.01%
True speed with the speedometer calibrated for 225/75R15
IndicatedActual on 225/75R15Actual on 215/65R17Difference
30 mph30.0 mph29.7 mph−0.3 mph
60 mph60.0 mph59.4 mph−0.6 mph
75 mph75.0 mph74.2 mph−0.8 mph

Ride-height change: 215/65R17 lowers the vehicle by 0.14 in (3.6 mm) at the axle (half the −7.2 mm diameter difference).

215/65R17 is 0.28 in shorter than 225/75R15 and 10 mm narrower, a 1.00% difference in overall diameter.

With the speedometer calibrated for 225/75R15, an indicated 60 mph is actually 59.4 mph on 215/65R17, and revolutions per mile change from 713 to 720.

215/65R17 mounts on a 17-inch wheel, a plus-2 fitment from the 15-inch wheel of 225/75R15.

Size pages

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