TireSizesFinder

175/80R13 vs 155/80R14

155/80R14 is 0.26 in (6.6 mm) shorter than 175/80R13, a −1.08% diameter difference. With the speedometer set for 175/80R13, an indicated 60 mph is 59.4 mph on 155/80R14.

Is this a safe swap?

Diameter difference −1.08%: within the ±3% guideline

By overall diameter alone, 155/80R14 falls inside the ±3% range commonly used as a guideline when replacing 175/80R13. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 175/80R13 (24.02 in) vs 155/80R14 (23.76 in)175/80R1324.02 in × 6.89 in155/80R1423.76 in × 6.10 in
Side profile and tread width, drawn to the same scale.
175/80R13 vs 155/80R14 differences
Measurement175/80R13155/80R14Difference% diff
Overall diameter24.02 in (610.2 mm)23.76 in (603.6 mm)−0.26 in (−6.6 mm)−1.08%
Sidewall height5.51 in (140.0 mm)4.88 in (124.0 mm)−0.63 in (−16.0 mm)−11.43%
Section width6.89 in (175.0 mm)6.10 in (155.0 mm)−0.79 in (−20.0 mm)−11.43%
Circumference75.47 in (1,917.0 mm)74.66 in (1,896.3 mm)−0.82 in (−20.7 mm)−1.08%
Revolutions per mile840849+9+1.09%
True speed with the speedometer calibrated for 175/80R13
IndicatedActual on 175/80R13Actual on 155/80R14Difference
30 mph30.0 mph29.7 mph−0.3 mph
60 mph60.0 mph59.4 mph−0.6 mph
75 mph75.0 mph74.2 mph−0.8 mph

Ride-height change: 155/80R14 lowers the vehicle by 0.13 in (3.3 mm) at the axle (half the −6.6 mm diameter difference).

155/80R14 is 0.26 in shorter than 175/80R13 and 20 mm narrower, a 1.08% difference in overall diameter.

With the speedometer calibrated for 175/80R13, an indicated 60 mph is actually 59.4 mph on 155/80R14, and revolutions per mile change from 840 to 849.

155/80R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 175/80R13.

Size pages

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