TireSizesFinder

165/80R13 vs 185/65R14

185/65R14 is 0.07 in (1.9 mm) taller than 165/80R13, a +0.32% diameter difference. With the speedometer set for 165/80R13, an indicated 60 mph is 60.2 mph on 185/65R14.

Is this a safe swap?

Diameter difference +0.32%: under 1%

By overall diameter alone, 185/65R14 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 185/65R14 (23.47 in)165/80R1323.39 in × 6.50 in185/65R1423.47 in × 7.28 in
Side profile and tread width, drawn to the same scale.
165/80R13 vs 185/65R14 differences
Measurement165/80R13185/65R14Difference% diff
Overall diameter23.39 in (594.2 mm)23.47 in (596.1 mm)+0.07 in (+1.9 mm)+0.32%
Sidewall height5.20 in (132.0 mm)4.73 in (120.3 mm)−0.46 in (−11.7 mm)−8.90%
Section width6.50 in (165.0 mm)7.28 in (185.0 mm)+0.79 in (+20.0 mm)+12.12%
Circumference73.49 in (1,866.7 mm)73.73 in (1,872.7 mm)+0.24 in (+6.0 mm)+0.32%
Revolutions per mile862859−3−0.32%
True speed with the speedometer calibrated for 165/80R13
IndicatedActual on 165/80R13Actual on 185/65R14Difference
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: 185/65R14 raises the vehicle by 0.04 in (0.9 mm) at the axle (half the +1.9 mm diameter difference).

185/65R14 is 0.07 in taller than 165/80R13 and 20 mm wider, a 0.32% difference in overall diameter.

With the speedometer calibrated for 165/80R13, an indicated 60 mph is actually 60.2 mph on 185/65R14, and revolutions per mile change from 862 to 859.

185/65R14 mounts on a 14-inch wheel, a plus-1 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.