TireSizesFinder

215/50R15 vs 205/45R16

205/45R16 is 0.20 in (5.1 mm) shorter than 215/50R15, a −0.86% diameter difference. With the speedometer set for 215/50R15, an indicated 60 mph is 59.5 mph on 205/45R16.

Is this a safe swap?

Diameter difference −0.86%: under 1%

By overall diameter alone, 205/45R16 is a near match for 215/50R15; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 215/50R15 (23.46 in) vs 205/45R16 (23.26 in)215/50R1523.46 in × 8.46 in205/45R1623.26 in × 8.07 in
Side profile and tread width, drawn to the same scale.
215/50R15 vs 205/45R16 differences
Measurement215/50R15205/45R16Difference% diff
Overall diameter23.46 in (596.0 mm)23.26 in (590.9 mm)−0.20 in (−5.1 mm)−0.86%
Sidewall height4.23 in (107.5 mm)3.63 in (92.3 mm)−0.60 in (−15.2 mm)−14.19%
Section width8.46 in (215.0 mm)8.07 in (205.0 mm)−0.39 in (−10.0 mm)−4.65%
Circumference73.72 in (1,872.4 mm)73.09 in (1,856.4 mm)−0.63 in (−16.0 mm)−0.86%
Revolutions per mile860867+7+0.86%
True speed with the speedometer calibrated for 215/50R15
IndicatedActual on 215/50R15Actual on 205/45R16Difference
30 mph30.0 mph29.7 mph−0.3 mph
60 mph60.0 mph59.5 mph−0.5 mph
75 mph75.0 mph74.4 mph−0.6 mph

Ride-height change: 205/45R16 lowers the vehicle by 0.10 in (2.6 mm) at the axle (half the −5.1 mm diameter difference).

205/45R16 is 0.20 in shorter than 215/50R15 and 10 mm narrower, a 0.86% difference in overall diameter.

With the speedometer calibrated for 215/50R15, an indicated 60 mph is actually 59.5 mph on 205/45R16, and revolutions per mile change from 860 to 867.

205/45R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 215/50R15.

Size pages

Other comparisons with 215/50R15

Other comparisons with 205/45R16

Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.