205/65R15 vs 215/55R16

215/55R16 is 0.18 in (4.6 mm) shorter than 205/65R15, a −0.71% diameter difference. With the speedometer set for 205/65R15, an indicated 60 mph is 59.6 mph on 215/55R16.

Is this a safe swap?

Diameter difference −0.71%: under 1%

By overall diameter alone, 215/55R16 is a near match for 205/65R15; 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.

205/65R15 vs 215/55R16 differences
Measurement	205/65R15	215/55R16	Difference	% diff
Overall diameter	25.49 in (647.5 mm)	25.31 in (642.9 mm)	−0.18 in (−4.6 mm)	−0.71%
Sidewall height	5.25 in (133.3 mm)	4.66 in (118.3 mm)	−0.59 in (−15.0 mm)	−11.26%
Section width	8.07 in (205.0 mm)	8.46 in (215.0 mm)	+0.39 in (+10.0 mm)	+4.88%
Circumference	80.09 in (2,034.2 mm)	79.52 in (2,019.7 mm)	−0.57 in (−14.5 mm)	−0.71%
Revolutions per mile	791	797	+6	+0.72%

True speed with the speedometer calibrated for 205/65R15
Indicated	Actual on 205/65R15	Actual on 215/55R16	Difference
30 mph	30.0 mph	29.8 mph	−0.2 mph
60 mph	60.0 mph	59.6 mph	−0.4 mph
75 mph	75.0 mph	74.5 mph	−0.5 mph

Ride-height change: 215/55R16 lowers the vehicle by 0.09 in (2.3 mm) at the axle (half the −4.6 mm diameter difference).

215/55R16 is 0.18 in shorter than 205/65R15 and 10 mm wider, a 0.71% difference in overall diameter.

With the speedometer calibrated for 205/65R15, an indicated 60 mph is actually 59.6 mph on 215/55R16, and revolutions per mile change from 791 to 797.

215/55R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 205/65R15.

Size pages

Other comparisons with 205/65R15

Other comparisons with 215/55R16

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