155/80R13 vs 165/65R14

165/65R14 is 0.32 in (8.1 mm) shorter than 155/80R13, a −1.40% diameter difference. With the speedometer set for 155/80R13, an indicated 60 mph is 59.2 mph on 165/65R14.

Is this a safe swap?

Diameter difference −1.40%: within the ±3% guideline

By overall diameter alone, 165/65R14 falls inside the ±3% range commonly used as a guideline when replacing 155/80R13. 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.

155/80R13 vs 165/65R14 differences
Measurement	155/80R13	165/65R14	Difference	% diff
Overall diameter	22.76 in (578.2 mm)	22.44 in (570.1 mm)	−0.32 in (−8.1 mm)	−1.40%
Sidewall height	4.88 in (124.0 mm)	4.22 in (107.3 mm)	−0.66 in (−16.7 mm)	−13.51%
Section width	6.10 in (155.0 mm)	6.50 in (165.0 mm)	+0.39 in (+10.0 mm)	+6.45%
Circumference	71.51 in (1,816.5 mm)	70.51 in (1,791.0 mm)	−1.00 in (−25.4 mm)	−1.40%
Revolutions per mile	886	899	+13	+1.42%

True speed with the speedometer calibrated for 155/80R13
Indicated	Actual on 155/80R13	Actual on 165/65R14	Difference
30 mph	30.0 mph	29.6 mph	−0.4 mph
60 mph	60.0 mph	59.2 mph	−0.8 mph
75 mph	75.0 mph	73.9 mph	−1.1 mph

Ride-height change: 165/65R14 lowers the vehicle by 0.16 in (4.1 mm) at the axle (half the −8.1 mm diameter difference).

165/65R14 is 0.32 in shorter than 155/80R13 and 10 mm wider, a 1.40% difference in overall diameter.

With the speedometer calibrated for 155/80R13, an indicated 60 mph is actually 59.2 mph on 165/65R14, and revolutions per mile change from 886 to 899.

165/65R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 155/80R13.

Size pages

Other comparisons with 155/80R13

Other comparisons with 165/65R14

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