TireSizesFinder

185/60R13 vs 165/70R13

165/70R13 is 0.35 in (9.0 mm) taller than 185/60R13, a +1.63% diameter difference. With the speedometer set for 185/60R13, an indicated 60 mph is 61.0 mph on 165/70R13.

Is this a safe swap?

Diameter difference +1.63%: within the ±3% guideline

By overall diameter alone, 165/70R13 falls inside the ±3% range commonly used as a guideline when replacing 185/60R13. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 185/60R13 (21.74 in) vs 165/70R13 (22.09 in)185/60R1321.74 in × 7.28 in165/70R1322.09 in × 6.50 in
Side profile and tread width, drawn to the same scale.
185/60R13 vs 165/70R13 differences
Measurement185/60R13165/70R13Difference% diff
Overall diameter21.74 in (552.2 mm)22.09 in (561.2 mm)+0.35 in (+9.0 mm)+1.63%
Sidewall height4.37 in (111.0 mm)4.55 in (115.5 mm)+0.18 in (+4.5 mm)+4.05%
Section width7.28 in (185.0 mm)6.50 in (165.0 mm)−0.79 in (−20.0 mm)−10.81%
Circumference68.30 in (1,734.8 mm)69.41 in (1,763.1 mm)+1.11 in (+28.3 mm)+1.63%
Revolutions per mile928913−15−1.60%
True speed with the speedometer calibrated for 185/60R13
IndicatedActual on 185/60R13Actual on 165/70R13Difference
30 mph30.0 mph30.5 mph+0.5 mph
60 mph60.0 mph61.0 mph+1.0 mph
75 mph75.0 mph76.2 mph+1.2 mph

Ride-height change: 165/70R13 raises the vehicle by 0.18 in (4.5 mm) at the axle (half the +9.0 mm diameter difference).

165/70R13 is 0.35 in taller than 185/60R13 and 20 mm narrower, a 1.63% difference in overall diameter.

With the speedometer calibrated for 185/60R13, an indicated 60 mph is actually 61.0 mph on 165/70R13, and revolutions per mile change from 928 to 913.

Both sizes mount on 13-inch wheels.

Size pages

Other comparisons with 185/60R13

Other comparisons with 165/70R13

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