175/70R13 vs 165/65R14

165/65R14 is 0.20 in (5.1 mm) shorter than 175/70R13, a −0.89% diameter difference. With the speedometer set for 175/70R13, an indicated 60 mph is 59.5 mph on 165/65R14.

Is this a safe swap?

Diameter difference −0.89%: under 1%

By overall diameter alone, 165/65R14 is a near match for 175/70R13; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

Side profile and tread width, drawn to the same scale.

175/70R13 vs 165/65R14 differences
Measurement	175/70R13	165/65R14	Difference	% diff
Overall diameter	22.65 in (575.2 mm)	22.44 in (570.1 mm)	−0.20 in (−5.1 mm)	−0.89%
Sidewall height	4.82 in (122.5 mm)	4.22 in (107.3 mm)	−0.60 in (−15.2 mm)	−12.45%
Section width	6.89 in (175.0 mm)	6.50 in (165.0 mm)	−0.39 in (−10.0 mm)	−5.71%
Circumference	71.14 in (1,807.0 mm)	70.51 in (1,791.0 mm)	−0.63 in (−16.0 mm)	−0.89%
Revolutions per mile	891	899	+8	+0.89%

True speed with the speedometer calibrated for 175/70R13
Indicated	Actual on 175/70R13	Actual on 165/65R14	Difference
30 mph	30.0 mph	29.7 mph	−0.3 mph
60 mph	60.0 mph	59.5 mph	−0.5 mph
75 mph	75.0 mph	74.3 mph	−0.7 mph

Ride-height change: 165/65R14 lowers the vehicle by 0.10 in (2.6 mm) at the axle (half the −5.1 mm diameter difference).

165/65R14 is 0.20 in shorter than 175/70R13 and 10 mm narrower, a 0.89% difference in overall diameter.

With the speedometer calibrated for 175/70R13, an indicated 60 mph is actually 59.5 mph on 165/65R14, and revolutions per mile change from 891 to 899.

165/65R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 175/70R13.

Size pages

Other comparisons with 175/70R13

Other comparisons with 165/65R14

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.