TireSizesFinder

155/70R13 vs 165/70R13

165/70R13 is 0.55 in (14.0 mm) taller than 155/70R13, a +2.56% diameter difference. With the speedometer set for 155/70R13, an indicated 60 mph is 61.5 mph on 165/70R13.

Is this a safe swap?

Diameter difference +2.56%: within the ±3% guideline

By overall diameter alone, 165/70R13 falls inside the ±3% range commonly used as a guideline when replacing 155/70R13. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 155/70R13 (21.54 in) vs 165/70R13 (22.09 in)155/70R1321.54 in × 6.10 in165/70R1322.09 in × 6.50 in
Side profile and tread width, drawn to the same scale.
155/70R13 vs 165/70R13 differences
Measurement155/70R13165/70R13Difference% diff
Overall diameter21.54 in (547.2 mm)22.09 in (561.2 mm)+0.55 in (+14.0 mm)+2.56%
Sidewall height4.27 in (108.5 mm)4.55 in (115.5 mm)+0.28 in (+7.0 mm)+6.45%
Section width6.10 in (155.0 mm)6.50 in (165.0 mm)+0.39 in (+10.0 mm)+6.45%
Circumference67.68 in (1,719.1 mm)69.41 in (1,763.1 mm)+1.73 in (+44.0 mm)+2.56%
Revolutions per mile936913−23−2.49%
True speed with the speedometer calibrated for 155/70R13
IndicatedActual on 155/70R13Actual on 165/70R13Difference
30 mph30.0 mph30.8 mph+0.8 mph
60 mph60.0 mph61.5 mph+1.5 mph
75 mph75.0 mph76.9 mph+1.9 mph

Ride-height change: 165/70R13 raises the vehicle by 0.28 in (7.0 mm) at the axle (half the +14.0 mm diameter difference).

165/70R13 is 0.55 in taller than 155/70R13 and 10 mm wider, a 2.56% difference in overall diameter.

With the speedometer calibrated for 155/70R13, an indicated 60 mph is actually 61.5 mph on 165/70R13, and revolutions per mile change from 936 to 913.

Both sizes mount on 13-inch wheels.

Size pages

Other comparisons with 155/70R13

Other comparisons with 165/70R13

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