215/75R15 vs 205/75R16

205/75R16 is 0.41 in (10.4 mm) taller than 215/75R15, a +1.48% diameter difference. With the speedometer set for 215/75R15, an indicated 60 mph is 60.9 mph on 205/75R16.

Is this a safe swap?

Diameter difference +1.48%: within the ±3% guideline

By overall diameter alone, 205/75R16 falls inside the ±3% range commonly used as a guideline when replacing 215/75R15. 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.

215/75R15 vs 205/75R16 differences
Measurement	215/75R15	205/75R16	Difference	% diff
Overall diameter	27.70 in (703.5 mm)	28.11 in (713.9 mm)	+0.41 in (+10.4 mm)	+1.48%
Sidewall height	6.35 in (161.3 mm)	6.05 in (153.8 mm)	−0.30 in (−7.5 mm)	−4.65%
Section width	8.46 in (215.0 mm)	8.07 in (205.0 mm)	−0.39 in (−10.0 mm)	−4.65%
Circumference	87.01 in (2,210.1 mm)	88.30 in (2,242.8 mm)	+1.29 in (+32.7 mm)	+1.48%
Revolutions per mile	728	718	−11	−1.46%

True speed with the speedometer calibrated for 215/75R15
Indicated	Actual on 215/75R15	Actual on 205/75R16	Difference
30 mph	30.0 mph	30.4 mph	+0.4 mph
60 mph	60.0 mph	60.9 mph	+0.9 mph
75 mph	75.0 mph	76.1 mph	+1.1 mph

Ride-height change: 205/75R16 raises the vehicle by 0.20 in (5.2 mm) at the axle (half the +10.4 mm diameter difference).

205/75R16 is 0.41 in taller than 215/75R15 and 10 mm narrower, a 1.48% difference in overall diameter.

With the speedometer calibrated for 215/75R15, an indicated 60 mph is actually 60.9 mph on 205/75R16, and revolutions per mile change from 728 to 718.

205/75R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 215/75R15.

Size pages

Other comparisons with 215/75R15

Other comparisons with 205/75R16

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