205/50R17 vs 215/50R17

215/50R17 is 0.39 in (10.0 mm) taller than 205/50R17, a +1.57% diameter difference. With the speedometer set for 205/50R17, an indicated 60 mph is 60.9 mph on 215/50R17.

Is this a safe swap?

Diameter difference +1.57%: within the ±3% guideline

By overall diameter alone, 215/50R17 falls inside the ±3% range commonly used as a guideline when replacing 205/50R17. 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.

205/50R17 vs 215/50R17 differences
Measurement	205/50R17	215/50R17	Difference	% diff
Overall diameter	25.07 in (636.8 mm)	25.46 in (646.8 mm)	+0.39 in (+10.0 mm)	+1.57%
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	78.76 in (2,000.6 mm)	80.00 in (2,032.0 mm)	+1.24 in (+31.4 mm)	+1.57%
Revolutions per mile	804	792	−12	−1.55%

True speed with the speedometer calibrated for 205/50R17
Indicated	Actual on 205/50R17	Actual on 215/50R17	Difference
30 mph	30.0 mph	30.5 mph	+0.5 mph
60 mph	60.0 mph	60.9 mph	+0.9 mph
75 mph	75.0 mph	76.2 mph	+1.2 mph

Ride-height change: 215/50R17 raises the vehicle by 0.20 in (5.0 mm) at the axle (half the +10.0 mm diameter difference).

215/50R17 is 0.39 in taller than 205/50R17 and 10 mm wider, a 1.57% difference in overall diameter.

With the speedometer calibrated for 205/50R17, an indicated 60 mph is actually 60.9 mph on 215/50R17, and revolutions per mile change from 804 to 792.

Both sizes mount on 17-inch wheels.

Size pages

Other comparisons with 205/50R17

Other comparisons with 215/50R17

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