155/80R13 vs 185/60R14

185/60R14 is 0.02 in (0.6 mm) shorter than 155/80R13, a −0.10% diameter difference. With the speedometer set for 155/80R13, an indicated 60 mph is 59.9 mph on 185/60R14.

Is this a safe swap?

Diameter difference −0.10%: under 1%

By overall diameter alone, 185/60R14 is a near match for 155/80R13; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

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

155/80R13 vs 185/60R14 differences
Measurement	155/80R13	185/60R14	Difference	% diff
Overall diameter	22.76 in (578.2 mm)	22.74 in (577.6 mm)	−0.02 in (−0.6 mm)	−0.10%
Sidewall height	4.88 in (124.0 mm)	4.37 in (111.0 mm)	−0.51 in (−13.0 mm)	−10.48%
Section width	6.10 in (155.0 mm)	7.28 in (185.0 mm)	+1.18 in (+30.0 mm)	+19.35%
Circumference	71.51 in (1,816.5 mm)	71.44 in (1,814.6 mm)	−0.07 in (−1.9 mm)	−0.10%
Revolutions per mile	886	887	+1	+0.10%

True speed with the speedometer calibrated for 155/80R13
Indicated	Actual on 155/80R13	Actual on 185/60R14	Difference
30 mph	30.0 mph	30.0 mph	0.0 mph
60 mph	60.0 mph	59.9 mph	−0.1 mph
75 mph	75.0 mph	74.9 mph	−0.1 mph

Ride-height change: 185/60R14 lowers the vehicle by 0.01 in (0.3 mm) at the axle (half the −0.6 mm diameter difference).

185/60R14 is 0.02 in shorter than 155/80R13 and 30 mm wider, a 0.10% difference in overall diameter.

With the speedometer calibrated for 155/80R13, an indicated 60 mph is actually 59.9 mph on 185/60R14, and revolutions per mile change from 886 to 887.

185/60R14 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 185/60R14

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