TireSizesFinder

145/80R13 vs 185/60R14

185/60R14 is 0.61 in (15.4 mm) taller than 145/80R13, a +2.74% diameter difference. With the speedometer set for 145/80R13, an indicated 60 mph is 61.6 mph on 185/60R14.

Is this a safe swap?

Diameter difference +2.74%: within the ±3% guideline

By overall diameter alone, 185/60R14 falls inside the ±3% range commonly used as a guideline when replacing 145/80R13. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 145/80R13 (22.13 in) vs 185/60R14 (22.74 in)145/80R1322.13 in × 5.71 in185/60R1422.74 in × 7.28 in
Side profile and tread width, drawn to the same scale.
145/80R13 vs 185/60R14 differences
Measurement145/80R13185/60R14Difference% diff
Overall diameter22.13 in (562.2 mm)22.74 in (577.6 mm)+0.61 in (+15.4 mm)+2.74%
Sidewall height4.57 in (116.0 mm)4.37 in (111.0 mm)−0.20 in (−5.0 mm)−4.31%
Section width5.71 in (145.0 mm)7.28 in (185.0 mm)+1.57 in (+40.0 mm)+27.59%
Circumference69.54 in (1,766.2 mm)71.44 in (1,814.6 mm)+1.90 in (+48.4 mm)+2.74%
Revolutions per mile911887−24−2.67%
True speed with the speedometer calibrated for 145/80R13
IndicatedActual on 145/80R13Actual on 185/60R14Difference
30 mph30.0 mph30.8 mph+0.8 mph
60 mph60.0 mph61.6 mph+1.6 mph
75 mph75.0 mph77.1 mph+2.1 mph

Ride-height change: 185/60R14 raises the vehicle by 0.30 in (7.7 mm) at the axle (half the +15.4 mm diameter difference).

185/60R14 is 0.61 in taller than 145/80R13 and 40 mm wider, a 2.74% difference in overall diameter.

With the speedometer calibrated for 145/80R13, an indicated 60 mph is actually 61.6 mph on 185/60R14, and revolutions per mile change from 911 to 887.

185/60R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 145/80R13.

Size pages

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