TireSizesFinder

165/80R13 vs 215/50R15

215/50R15 is 0.07 in (1.8 mm) taller than 165/80R13, a +0.30% diameter difference. With the speedometer set for 165/80R13, an indicated 60 mph is 60.2 mph on 215/50R15.

Is this a safe swap?

Diameter difference +0.30%: under 1%

By overall diameter alone, 215/50R15 is a near match for 165/80R13; 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: 165/80R13 (23.39 in) vs 215/50R15 (23.46 in)165/80R1323.39 in × 6.50 in215/50R1523.46 in × 8.46 in
Side profile and tread width, drawn to the same scale.
165/80R13 vs 215/50R15 differences
Measurement165/80R13215/50R15Difference% diff
Overall diameter23.39 in (594.2 mm)23.46 in (596.0 mm)+0.07 in (+1.8 mm)+0.30%
Sidewall height5.20 in (132.0 mm)4.23 in (107.5 mm)−0.96 in (−24.5 mm)−18.56%
Section width6.50 in (165.0 mm)8.46 in (215.0 mm)+1.97 in (+50.0 mm)+30.30%
Circumference73.49 in (1,866.7 mm)73.72 in (1,872.4 mm)+0.22 in (+5.7 mm)+0.30%
Revolutions per mile862860−3−0.30%
True speed with the speedometer calibrated for 165/80R13
IndicatedActual on 165/80R13Actual on 215/50R15Difference
30 mph30.0 mph30.1 mph+0.1 mph
60 mph60.0 mph60.2 mph+0.2 mph
75 mph75.0 mph75.2 mph+0.2 mph

Ride-height change: 215/50R15 raises the vehicle by 0.04 in (0.9 mm) at the axle (half the +1.8 mm diameter difference).

215/50R15 is 0.07 in taller than 165/80R13 and 50 mm wider, a 0.30% difference in overall diameter.

With the speedometer calibrated for 165/80R13, an indicated 60 mph is actually 60.2 mph on 215/50R15, and revolutions per mile change from 862 to 860.

215/50R15 mounts on a 15-inch wheel, a plus-2 fitment from the 13-inch wheel of 165/80R13.

Size pages

Other comparisons with 165/80R13

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