TireSizesFinder

185/70R13 vs 165/70R14

165/70R14 is 0.10 in (2.6 mm) shorter than 185/70R13, a −0.44% diameter difference. With the speedometer set for 185/70R13, an indicated 60 mph is 59.7 mph on 165/70R14.

Is this a safe swap?

Diameter difference −0.44%: under 1%

By overall diameter alone, 165/70R14 is a near match for 185/70R13; 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: 185/70R13 (23.20 in) vs 165/70R14 (23.09 in)185/70R1323.20 in × 7.28 in165/70R1423.09 in × 6.50 in
Side profile and tread width, drawn to the same scale.
185/70R13 vs 165/70R14 differences
Measurement185/70R13165/70R14Difference% diff
Overall diameter23.20 in (589.2 mm)23.09 in (586.6 mm)−0.10 in (−2.6 mm)−0.44%
Sidewall height5.10 in (129.5 mm)4.55 in (115.5 mm)−0.55 in (−14.0 mm)−10.81%
Section width7.28 in (185.0 mm)6.50 in (165.0 mm)−0.79 in (−20.0 mm)−10.81%
Circumference72.88 in (1,851.0 mm)72.55 in (1,842.9 mm)−0.32 in (−8.2 mm)−0.44%
Revolutions per mile869873+4+0.44%
True speed with the speedometer calibrated for 185/70R13
IndicatedActual on 185/70R13Actual on 165/70R14Difference
30 mph30.0 mph29.9 mph−0.1 mph
60 mph60.0 mph59.7 mph−0.3 mph
75 mph75.0 mph74.7 mph−0.3 mph

Ride-height change: 165/70R14 lowers the vehicle by 0.05 in (1.3 mm) at the axle (half the −2.6 mm diameter difference).

165/70R14 is 0.10 in shorter than 185/70R13 and 20 mm narrower, a 0.44% difference in overall diameter.

With the speedometer calibrated for 185/70R13, an indicated 60 mph is actually 59.7 mph on 165/70R14, and revolutions per mile change from 869 to 873.

165/70R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 185/70R13.

Size pages

Other comparisons with 185/70R13

Other comparisons with 165/70R14

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