TireSizesFinder

145/80R13 vs 165/65R14

165/65R14 is 0.31 in (7.9 mm) taller than 145/80R13, a +1.41% diameter difference. With the speedometer set for 145/80R13, an indicated 60 mph is 60.8 mph on 165/65R14.

Is this a safe swap?

Diameter difference +1.41%: within the ±3% guideline

By overall diameter alone, 165/65R14 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 165/65R14 (22.44 in)145/80R1322.13 in × 5.71 in165/65R1422.44 in × 6.50 in
Side profile and tread width, drawn to the same scale.
145/80R13 vs 165/65R14 differences
Measurement145/80R13165/65R14Difference% diff
Overall diameter22.13 in (562.2 mm)22.44 in (570.1 mm)+0.31 in (+7.9 mm)+1.41%
Sidewall height4.57 in (116.0 mm)4.22 in (107.3 mm)−0.34 in (−8.7 mm)−7.54%
Section width5.71 in (145.0 mm)6.50 in (165.0 mm)+0.79 in (+20.0 mm)+13.79%
Circumference69.54 in (1,766.2 mm)70.51 in (1,791.0 mm)+0.98 in (+24.8 mm)+1.41%
Revolutions per mile911899−13−1.39%
True speed with the speedometer calibrated for 145/80R13
IndicatedActual on 145/80R13Actual on 165/65R14Difference
30 mph30.0 mph30.4 mph+0.4 mph
60 mph60.0 mph60.8 mph+0.8 mph
75 mph75.0 mph76.1 mph+1.1 mph

Ride-height change: 165/65R14 raises the vehicle by 0.16 in (3.9 mm) at the axle (half the +7.9 mm diameter difference).

165/65R14 is 0.31 in taller than 145/80R13 and 20 mm wider, a 1.41% difference in overall diameter.

With the speedometer calibrated for 145/80R13, an indicated 60 mph is actually 60.8 mph on 165/65R14, and revolutions per mile change from 911 to 899.

165/65R14 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.