165/70R13 vs 185/60R14

185/60R14 is 0.65 in (16.4 mm) taller than 165/70R13, a +2.92% diameter difference. With the speedometer set for 165/70R13, an indicated 60 mph is 61.8 mph on 185/60R14.

Is this a safe swap?

Diameter difference +2.92%: within the ±3% guideline

By overall diameter alone, 185/60R14 falls inside the ±3% range commonly used as a guideline when replacing 165/70R13. 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.

165/70R13 vs 185/60R14 differences
Measurement	165/70R13	185/60R14	Difference	% diff
Overall diameter	22.09 in (561.2 mm)	22.74 in (577.6 mm)	+0.65 in (+16.4 mm)	+2.92%
Sidewall height	4.55 in (115.5 mm)	4.37 in (111.0 mm)	−0.18 in (−4.5 mm)	−3.90%
Section width	6.50 in (165.0 mm)	7.28 in (185.0 mm)	+0.79 in (+20.0 mm)	+12.12%
Circumference	69.41 in (1,763.1 mm)	71.44 in (1,814.6 mm)	+2.03 in (+51.5 mm)	+2.92%
Revolutions per mile	913	887	−26	−2.84%

True speed with the speedometer calibrated for 165/70R13
Indicated	Actual on 165/70R13	Actual on 185/60R14	Difference
30 mph	30.0 mph	30.9 mph	+0.9 mph
60 mph	60.0 mph	61.8 mph	+1.8 mph
75 mph	75.0 mph	77.2 mph	+2.2 mph

Ride-height change: 185/60R14 raises the vehicle by 0.32 in (8.2 mm) at the axle (half the +16.4 mm diameter difference).

185/60R14 is 0.65 in taller than 165/70R13 and 20 mm wider, a 2.92% difference in overall diameter.

With the speedometer calibrated for 165/70R13, an indicated 60 mph is actually 61.8 mph on 185/60R14, and revolutions per mile change from 913 to 887.

185/60R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 165/70R13.

Size pages

Other comparisons with 165/70R13

Other comparisons with 185/60R14

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