TireSizesFinder

225/65R15 vs 215/70R15

215/70R15 is 0.33 in (8.5 mm) taller than 225/65R15, a +1.26% diameter difference. With the speedometer set for 225/65R15, an indicated 60 mph is 60.8 mph on 215/70R15.

Is this a safe swap?

Diameter difference +1.26%: within the ±3% guideline

By overall diameter alone, 215/70R15 falls inside the ±3% range commonly used as a guideline when replacing 225/65R15. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 225/65R15 (26.52 in) vs 215/70R15 (26.85 in)225/65R1526.52 in × 8.86 in215/70R1526.85 in × 8.46 in
Side profile and tread width, drawn to the same scale.
225/65R15 vs 215/70R15 differences
Measurement225/65R15215/70R15Difference% diff
Overall diameter26.52 in (673.5 mm)26.85 in (682.0 mm)+0.33 in (+8.5 mm)+1.26%
Sidewall height5.76 in (146.3 mm)5.93 in (150.5 mm)+0.17 in (+4.3 mm)+2.91%
Section width8.86 in (225.0 mm)8.46 in (215.0 mm)−0.39 in (−10.0 mm)−4.44%
Circumference83.30 in (2,115.9 mm)84.35 in (2,142.6 mm)+1.05 in (+26.7 mm)+1.26%
Revolutions per mile761751−9−1.25%
True speed with the speedometer calibrated for 225/65R15
IndicatedActual on 225/65R15Actual on 215/70R15Difference
30 mph30.0 mph30.4 mph+0.4 mph
60 mph60.0 mph60.8 mph+0.8 mph
75 mph75.0 mph75.9 mph+0.9 mph

Ride-height change: 215/70R15 raises the vehicle by 0.17 in (4.3 mm) at the axle (half the +8.5 mm diameter difference).

215/70R15 is 0.33 in taller than 225/65R15 and 10 mm narrower, a 1.26% difference in overall diameter.

With the speedometer calibrated for 225/65R15, an indicated 60 mph is actually 60.8 mph on 215/70R15, and revolutions per mile change from 761 to 751.

Both sizes mount on 15-inch wheels.

Size pages

Other comparisons with 225/65R15

Other comparisons with 215/70R15

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