TireSizesFinder

215/50R15 vs 215/45R16

215/45R16 is 0.15 in (3.9 mm) taller than 215/50R15, a +0.65% diameter difference. With the speedometer set for 215/50R15, an indicated 60 mph is 60.4 mph on 215/45R16.

Is this a safe swap?

Diameter difference +0.65%: under 1%

By overall diameter alone, 215/45R16 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 215/45R16 (23.62 in)215/50R1523.46 in × 8.46 in215/45R1623.62 in × 8.46 in
Side profile and tread width, drawn to the same scale.
215/50R15 vs 215/45R16 differences
Measurement215/50R15215/45R16Difference% diff
Overall diameter23.46 in (596.0 mm)23.62 in (599.9 mm)+0.15 in (+3.9 mm)+0.65%
Sidewall height4.23 in (107.5 mm)3.81 in (96.8 mm)−0.42 in (−10.7 mm)−10.00%
Section width8.46 in (215.0 mm)8.46 in (215.0 mm)0.00 in (0.0 mm)0.00%
Circumference73.72 in (1,872.4 mm)74.20 in (1,884.6 mm)+0.48 in (+12.3 mm)+0.65%
Revolutions per mile860854−6−0.65%
True speed with the speedometer calibrated for 215/50R15
IndicatedActual on 215/50R15Actual on 215/45R16Difference
30 mph30.0 mph30.2 mph+0.2 mph
60 mph60.0 mph60.4 mph+0.4 mph
75 mph75.0 mph75.5 mph+0.5 mph

Ride-height change: 215/45R16 raises the vehicle by 0.08 in (1.9 mm) at the axle (half the +3.9 mm diameter difference).

215/45R16 is 0.15 in taller than 215/50R15 and the same width, a 0.65% difference in overall diameter.

With the speedometer calibrated for 215/50R15, an indicated 60 mph is actually 60.4 mph on 215/45R16, and revolutions per mile change from 860 to 854.

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

Size pages

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