215/75R16 vs 255/60R17

255/60R17 is 0.35 in (8.9 mm) taller than 215/75R16, a +1.22% diameter difference. With the speedometer set for 215/75R16, an indicated 60 mph is 60.7 mph on 255/60R17.

Is this a safe swap?

Diameter difference +1.22%: within the ±3% guideline

By overall diameter alone, 255/60R17 falls inside the ±3% range commonly used as a guideline when replacing 215/75R16. 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.

215/75R16 vs 255/60R17 differences
Measurement	215/75R16	255/60R17	Difference	% diff
Overall diameter	28.70 in (728.9 mm)	29.05 in (737.8 mm)	+0.35 in (+8.9 mm)	+1.22%
Sidewall height	6.35 in (161.3 mm)	6.02 in (153.0 mm)	−0.32 in (−8.2 mm)	−5.12%
Section width	8.46 in (215.0 mm)	10.04 in (255.0 mm)	+1.57 in (+40.0 mm)	+18.60%
Circumference	90.15 in (2,289.9 mm)	91.25 in (2,317.9 mm)	+1.10 in (+28.0 mm)	+1.22%
Revolutions per mile	703	694	−8	−1.21%

True speed with the speedometer calibrated for 215/75R16
Indicated	Actual on 215/75R16	Actual on 255/60R17	Difference
30 mph	30.0 mph	30.4 mph	+0.4 mph
60 mph	60.0 mph	60.7 mph	+0.7 mph
75 mph	75.0 mph	75.9 mph	+0.9 mph

Ride-height change: 255/60R17 raises the vehicle by 0.18 in (4.4 mm) at the axle (half the +8.9 mm diameter difference).

255/60R17 is 0.35 in taller than 215/75R16 and 40 mm wider, a 1.22% difference in overall diameter.

With the speedometer calibrated for 215/75R16, an indicated 60 mph is actually 60.7 mph on 255/60R17, and revolutions per mile change from 703 to 694.

255/60R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 215/75R16.

Size pages

Other comparisons with 215/75R16

Other comparisons with 255/60R17

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