205/50R15 vs 215/50R15

215/50R15 is 0.39 in (10.0 mm) taller than 205/50R15, a +1.71% diameter difference. With the speedometer set for 205/50R15, an indicated 60 mph is 61.0 mph on 215/50R15.

Is this a safe swap?

Diameter difference +1.71%: within the ±3% guideline

By overall diameter alone, 215/50R15 falls inside the ±3% range commonly used as a guideline when replacing 205/50R15. 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.

205/50R15 vs 215/50R15 differences
Measurement	205/50R15	215/50R15	Difference	% diff
Overall diameter	23.07 in (586.0 mm)	23.46 in (596.0 mm)	+0.39 in (+10.0 mm)	+1.71%
Sidewall height	4.04 in (102.5 mm)	4.23 in (107.5 mm)	+0.20 in (+5.0 mm)	+4.88%
Section width	8.07 in (205.0 mm)	8.46 in (215.0 mm)	+0.39 in (+10.0 mm)	+4.88%
Circumference	72.48 in (1,841.0 mm)	73.72 in (1,872.4 mm)	+1.24 in (+31.4 mm)	+1.71%
Revolutions per mile	874	860	−15	−1.68%

True speed with the speedometer calibrated for 205/50R15
Indicated	Actual on 205/50R15	Actual on 215/50R15	Difference
30 mph	30.0 mph	30.5 mph	+0.5 mph
60 mph	60.0 mph	61.0 mph	+1.0 mph
75 mph	75.0 mph	76.3 mph	+1.3 mph

Ride-height change: 215/50R15 raises the vehicle by 0.20 in (5.0 mm) at the axle (half the +10.0 mm diameter difference).

215/50R15 is 0.39 in taller than 205/50R15 and 10 mm wider, a 1.71% difference in overall diameter.

With the speedometer calibrated for 205/50R15, an indicated 60 mph is actually 61.0 mph on 215/50R15, and revolutions per mile change from 874 to 860.

Both sizes mount on 15-inch wheels.

Size pages

Other comparisons with 205/50R15

Other comparisons with 215/50R15

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