205/75R15 vs 215/75R15

215/75R15 is 0.59 in (15.0 mm) taller than 205/75R15, a +2.18% diameter difference. With the speedometer set for 205/75R15, an indicated 60 mph is 61.3 mph on 215/75R15.

Is this a safe swap?

Diameter difference +2.18%: within the ±3% guideline

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

205/75R15 vs 215/75R15 differences
Measurement	205/75R15	215/75R15	Difference	% diff
Overall diameter	27.11 in (688.5 mm)	27.70 in (703.5 mm)	+0.59 in (+15.0 mm)	+2.18%
Sidewall height	6.05 in (153.8 mm)	6.35 in (161.3 mm)	+0.30 in (+7.5 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	85.16 in (2,163.0 mm)	87.01 in (2,210.1 mm)	+1.86 in (+47.1 mm)	+2.18%
Revolutions per mile	744	728	−16	−2.13%

True speed with the speedometer calibrated for 205/75R15
Indicated	Actual on 205/75R15	Actual on 215/75R15	Difference
30 mph	30.0 mph	30.7 mph	+0.7 mph
60 mph	60.0 mph	61.3 mph	+1.3 mph
75 mph	75.0 mph	76.6 mph	+1.6 mph

Ride-height change: 215/75R15 raises the vehicle by 0.30 in (7.5 mm) at the axle (half the +15.0 mm diameter difference).

215/75R15 is 0.59 in taller than 205/75R15 and 10 mm wider, a 2.18% difference in overall diameter.

With the speedometer calibrated for 205/75R15, an indicated 60 mph is actually 61.3 mph on 215/75R15, and revolutions per mile change from 744 to 728.

Both sizes mount on 15-inch wheels.

Size pages

Other comparisons with 205/75R15

Other comparisons with 215/75R15

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