165/80R13 vs 175/70R14

175/70R14 is 0.25 in (6.4 mm) taller than 165/80R13, a +1.08% diameter difference. With the speedometer set for 165/80R13, an indicated 60 mph is 60.6 mph on 175/70R14.

Is this a safe swap?

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

By overall diameter alone, 175/70R14 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.

Side profile and tread width, drawn to the same scale.

165/80R13 vs 175/70R14 differences
Measurement	165/80R13	175/70R14	Difference	% diff
Overall diameter	23.39 in (594.2 mm)	23.65 in (600.6 mm)	+0.25 in (+6.4 mm)	+1.08%
Sidewall height	5.20 in (132.0 mm)	4.82 in (122.5 mm)	−0.37 in (−9.5 mm)	−7.20%
Section width	6.50 in (165.0 mm)	6.89 in (175.0 mm)	+0.39 in (+10.0 mm)	+6.06%
Circumference	73.49 in (1,866.7 mm)	74.29 in (1,886.8 mm)	+0.79 in (+20.1 mm)	+1.08%
Revolutions per mile	862	853	−9	−1.07%

True speed with the speedometer calibrated for 165/80R13
Indicated	Actual on 165/80R13	Actual on 175/70R14	Difference
30 mph	30.0 mph	30.3 mph	+0.3 mph
60 mph	60.0 mph	60.6 mph	+0.6 mph
75 mph	75.0 mph	75.8 mph	+0.8 mph

Ride-height change: 175/70R14 raises the vehicle by 0.13 in (3.2 mm) at the axle (half the +6.4 mm diameter difference).

175/70R14 is 0.25 in taller than 165/80R13 and 10 mm wider, a 1.08% difference in overall diameter.

With the speedometer calibrated for 165/80R13, an indicated 60 mph is actually 60.6 mph on 175/70R14, and revolutions per mile change from 862 to 853.

175/70R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 165/80R13.

Size pages

Other comparisons with 165/80R13

Other comparisons with 175/70R14

Source: Calculated from standard tire geometry formulas. Verified 2026-09-27. How these numbers are calculated.