255/50R17 vs 215/60R17

215/60R17 is 0.12 in (3.0 mm) taller than 255/50R17, a +0.44% diameter difference. With the speedometer set for 255/50R17, an indicated 60 mph is 60.3 mph on 215/60R17.

Is this a safe swap?

Diameter difference +0.44%: under 1%

By overall diameter alone, 215/60R17 is a near match for 255/50R17; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

Side profile and tread width, drawn to the same scale.

255/50R17 vs 215/60R17 differences
Measurement	255/50R17	215/60R17	Difference	% diff
Overall diameter	27.04 in (686.8 mm)	27.16 in (689.8 mm)	+0.12 in (+3.0 mm)	+0.44%
Sidewall height	5.02 in (127.5 mm)	5.08 in (129.0 mm)	+0.06 in (+1.5 mm)	+1.18%
Section width	10.04 in (255.0 mm)	8.46 in (215.0 mm)	−1.57 in (−40.0 mm)	−15.69%
Circumference	84.95 in (2,157.6 mm)	85.32 in (2,167.1 mm)	+0.37 in (+9.4 mm)	+0.44%
Revolutions per mile	746	743	−3	−0.43%

True speed with the speedometer calibrated for 255/50R17
Indicated	Actual on 255/50R17	Actual on 215/60R17	Difference
30 mph	30.0 mph	30.1 mph	+0.1 mph
60 mph	60.0 mph	60.3 mph	+0.3 mph
75 mph	75.0 mph	75.3 mph	+0.3 mph

Ride-height change: 215/60R17 raises the vehicle by 0.06 in (1.5 mm) at the axle (half the +3.0 mm diameter difference).

215/60R17 is 0.12 in taller than 255/50R17 and 40 mm narrower, a 0.44% difference in overall diameter.

With the speedometer calibrated for 255/50R17, an indicated 60 mph is actually 60.3 mph on 215/60R17, and revolutions per mile change from 746 to 743.

Both sizes mount on 17-inch wheels.

Size pages

Other comparisons with 255/50R17

Other comparisons with 215/60R17

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.