165/80R13 vs 175/80R13

175/80R13 is 0.63 in (16.0 mm) taller than 165/80R13, a +2.69% diameter difference. With the speedometer set for 165/80R13, an indicated 60 mph is 61.6 mph on 175/80R13.

Is this a safe swap?

Diameter difference +2.69%: within the ±3% guideline

By overall diameter alone, 175/80R13 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 175/80R13 differences
Measurement	165/80R13	175/80R13	Difference	% diff
Overall diameter	23.39 in (594.2 mm)	24.02 in (610.2 mm)	+0.63 in (+16.0 mm)	+2.69%
Sidewall height	5.20 in (132.0 mm)	5.51 in (140.0 mm)	+0.31 in (+8.0 mm)	+6.06%
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)	75.47 in (1,917.0 mm)	+1.98 in (+50.3 mm)	+2.69%
Revolutions per mile	862	840	−23	−2.62%

True speed with the speedometer calibrated for 165/80R13
Indicated	Actual on 165/80R13	Actual on 175/80R13	Difference
30 mph	30.0 mph	30.8 mph	+0.8 mph
60 mph	60.0 mph	61.6 mph	+1.6 mph
75 mph	75.0 mph	77.0 mph	+2.0 mph

Ride-height change: 175/80R13 raises the vehicle by 0.31 in (8.0 mm) at the axle (half the +16.0 mm diameter difference).

175/80R13 is 0.63 in taller than 165/80R13 and 10 mm wider, a 2.69% difference in overall diameter.

With the speedometer calibrated for 165/80R13, an indicated 60 mph is actually 61.6 mph on 175/80R13, and revolutions per mile change from 862 to 840.

Both sizes mount on 13-inch wheels.

Size pages

Other comparisons with 165/80R13

Other comparisons with 175/80R13

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