TireSizesFinder

165/80R13 vs 165/70R14

165/70R14 is 0.30 in (7.6 mm) shorter than 165/80R13, a −1.28% diameter difference. With the speedometer set for 165/80R13, an indicated 60 mph is 59.2 mph on 165/70R14.

Is this a safe swap?

Diameter difference −1.28%: within the ±3% guideline

By overall diameter alone, 165/70R14 falls inside the ±3% range commonly used as a guideline when replacing 165/80R13. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 165/80R13 (23.39 in) vs 165/70R14 (23.09 in)165/80R1323.39 in × 6.50 in165/70R1423.09 in × 6.50 in
Side profile and tread width, drawn to the same scale.
165/80R13 vs 165/70R14 differences
Measurement165/80R13165/70R14Difference% diff
Overall diameter23.39 in (594.2 mm)23.09 in (586.6 mm)−0.30 in (−7.6 mm)−1.28%
Sidewall height5.20 in (132.0 mm)4.55 in (115.5 mm)−0.65 in (−16.5 mm)−12.50%
Section width6.50 in (165.0 mm)6.50 in (165.0 mm)0.00 in (0.0 mm)0.00%
Circumference73.49 in (1,866.7 mm)72.55 in (1,842.9 mm)−0.94 in (−23.9 mm)−1.28%
Revolutions per mile862873+11+1.30%
True speed with the speedometer calibrated for 165/80R13
IndicatedActual on 165/80R13Actual on 165/70R14Difference
30 mph30.0 mph29.6 mph−0.4 mph
60 mph60.0 mph59.2 mph−0.8 mph
75 mph75.0 mph74.0 mph−1.0 mph

Ride-height change: 165/70R14 lowers the vehicle by 0.15 in (3.8 mm) at the axle (half the −7.6 mm diameter difference).

165/70R14 is 0.30 in shorter than 165/80R13 and the same width, a 1.28% difference in overall diameter.

With the speedometer calibrated for 165/80R13, an indicated 60 mph is actually 59.2 mph on 165/70R14, and revolutions per mile change from 862 to 873.

165/70R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 165/80R13.

Size pages

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