TireSizesFinder

185/70R13 vs 185/60R14

185/60R14 is 0.46 in (11.6 mm) shorter than 185/70R13, a −1.97% diameter difference. With the speedometer set for 185/70R13, an indicated 60 mph is 58.8 mph on 185/60R14.

Is this a safe swap?

Diameter difference −1.97%: within the ±3% guideline

By overall diameter alone, 185/60R14 falls inside the ±3% range commonly used as a guideline when replacing 185/70R13. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 185/70R13 (23.20 in) vs 185/60R14 (22.74 in)185/70R1323.20 in × 7.28 in185/60R1422.74 in × 7.28 in
Side profile and tread width, drawn to the same scale.
185/70R13 vs 185/60R14 differences
Measurement185/70R13185/60R14Difference% diff
Overall diameter23.20 in (589.2 mm)22.74 in (577.6 mm)−0.46 in (−11.6 mm)−1.97%
Sidewall height5.10 in (129.5 mm)4.37 in (111.0 mm)−0.73 in (−18.5 mm)−14.29%
Section width7.28 in (185.0 mm)7.28 in (185.0 mm)0.00 in (0.0 mm)0.00%
Circumference72.88 in (1,851.0 mm)71.44 in (1,814.6 mm)−1.43 in (−36.4 mm)−1.97%
Revolutions per mile869887+17+2.01%
True speed with the speedometer calibrated for 185/70R13
IndicatedActual on 185/70R13Actual on 185/60R14Difference
30 mph30.0 mph29.4 mph−0.6 mph
60 mph60.0 mph58.8 mph−1.2 mph
75 mph75.0 mph73.5 mph−1.5 mph

Ride-height change: 185/60R14 lowers the vehicle by 0.23 in (5.8 mm) at the axle (half the −11.6 mm diameter difference).

185/60R14 is 0.46 in shorter than 185/70R13 and the same width, a 1.97% difference in overall diameter.

With the speedometer calibrated for 185/70R13, an indicated 60 mph is actually 58.8 mph on 185/60R14, and revolutions per mile change from 869 to 887.

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

Size pages

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