215/70R14 vs 215/55R16

215/55R16 is 0.54 in (13.7 mm) shorter than 215/70R14, a −2.09% diameter difference. With the speedometer set for 215/70R14, an indicated 60 mph is 58.7 mph on 215/55R16.

Is this a safe swap?

Diameter difference −2.09%: within the ±3% guideline

By overall diameter alone, 215/55R16 falls inside the ±3% range commonly used as a guideline when replacing 215/70R14. 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.

215/70R14 vs 215/55R16 differences
Measurement	215/70R14	215/55R16	Difference	% diff
Overall diameter	25.85 in (656.6 mm)	25.31 in (642.9 mm)	−0.54 in (−13.7 mm)	−2.09%
Sidewall height	5.93 in (150.5 mm)	4.66 in (118.3 mm)	−1.27 in (−32.2 mm)	−21.43%
Section width	8.46 in (215.0 mm)	8.46 in (215.0 mm)	0.00 in (0.0 mm)	0.00%
Circumference	81.21 in (2,062.8 mm)	79.52 in (2,019.7 mm)	−1.69 in (−43.0 mm)	−2.09%
Revolutions per mile	780	797	+17	+2.13%

True speed with the speedometer calibrated for 215/70R14
Indicated	Actual on 215/70R14	Actual on 215/55R16	Difference
30 mph	30.0 mph	29.4 mph	−0.6 mph
60 mph	60.0 mph	58.7 mph	−1.3 mph
75 mph	75.0 mph	73.4 mph	−1.6 mph

Ride-height change: 215/55R16 lowers the vehicle by 0.27 in (6.8 mm) at the axle (half the −13.7 mm diameter difference).

215/55R16 is 0.54 in shorter than 215/70R14 and the same width, a 2.09% difference in overall diameter.

With the speedometer calibrated for 215/70R14, an indicated 60 mph is actually 58.7 mph on 215/55R16, and revolutions per mile change from 780 to 797.

215/55R16 mounts on a 16-inch wheel, a plus-2 fitment from the 14-inch wheel of 215/70R14.

Size pages

Other comparisons with 215/70R14

Other comparisons with 215/55R16

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