TireSizesFinder

165/80R13 vs 165/65R15

165/65R15 is 0.05 in (1.3 mm) taller than 165/80R13, a +0.22% diameter difference. With the speedometer set for 165/80R13, an indicated 60 mph is 60.1 mph on 165/65R15.

Is this a safe swap?

Diameter difference +0.22%: under 1%

By overall diameter alone, 165/65R15 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 165/65R15 (23.44 in)165/80R1323.39 in × 6.50 in165/65R1523.44 in × 6.50 in
Side profile and tread width, drawn to the same scale.
165/80R13 vs 165/65R15 differences
Measurement165/80R13165/65R15Difference% diff
Overall diameter23.39 in (594.2 mm)23.44 in (595.5 mm)+0.05 in (+1.3 mm)+0.22%
Sidewall height5.20 in (132.0 mm)4.22 in (107.3 mm)−0.97 in (−24.7 mm)−18.75%
Section width6.50 in (165.0 mm)6.50 in (165.0 mm)0.00 in (0.0 mm)0.00%
Circumference73.49 in (1,866.7 mm)73.65 in (1,870.8 mm)+0.16 in (+4.1 mm)+0.22%
Revolutions per mile862860−2−0.22%
True speed with the speedometer calibrated for 165/80R13
IndicatedActual on 165/80R13Actual on 165/65R15Difference
30 mph30.0 mph30.1 mph+0.1 mph
60 mph60.0 mph60.1 mph+0.1 mph
75 mph75.0 mph75.2 mph+0.2 mph

Ride-height change: 165/65R15 raises the vehicle by 0.03 in (0.6 mm) at the axle (half the +1.3 mm diameter difference).

165/65R15 is 0.05 in taller than 165/80R13 and the same width, a 0.22% difference in overall diameter.

With the speedometer calibrated for 165/80R13, an indicated 60 mph is actually 60.1 mph on 165/65R15, and revolutions per mile change from 862 to 860.

165/65R15 mounts on a 15-inch wheel, a plus-2 fitment from the 13-inch wheel of 165/80R13.

Size pages

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