165/70R13 vs 165/65R14

165/65R14 is 0.35 in (8.9 mm) taller than 165/70R13, a +1.59% diameter difference. With the speedometer set for 165/70R13, an indicated 60 mph is 61.0 mph on 165/65R14.

Is this a safe swap?

Diameter difference +1.59%: within the ±3% guideline

By overall diameter alone, 165/65R14 falls inside the ±3% range commonly used as a guideline when replacing 165/70R13. 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.

165/70R13 vs 165/65R14 differences
Measurement	165/70R13	165/65R14	Difference	% diff
Overall diameter	22.09 in (561.2 mm)	22.44 in (570.1 mm)	+0.35 in (+8.9 mm)	+1.59%
Sidewall height	4.55 in (115.5 mm)	4.22 in (107.3 mm)	−0.32 in (−8.2 mm)	−7.14%
Section width	6.50 in (165.0 mm)	6.50 in (165.0 mm)	0.00 in (0.0 mm)	0.00%
Circumference	69.41 in (1,763.1 mm)	70.51 in (1,791.0 mm)	+1.10 in (+28.0 mm)	+1.59%
Revolutions per mile	913	899	−14	−1.56%

True speed with the speedometer calibrated for 165/70R13
Indicated	Actual on 165/70R13	Actual on 165/65R14	Difference
30 mph	30.0 mph	30.5 mph	+0.5 mph
60 mph	60.0 mph	61.0 mph	+1.0 mph
75 mph	75.0 mph	76.2 mph	+1.2 mph

Ride-height change: 165/65R14 raises the vehicle by 0.18 in (4.4 mm) at the axle (half the +8.9 mm diameter difference).

165/65R14 is 0.35 in taller than 165/70R13 and the same width, a 1.59% difference in overall diameter.

With the speedometer calibrated for 165/70R13, an indicated 60 mph is actually 61.0 mph on 165/65R14, and revolutions per mile change from 913 to 899.

165/65R14 mounts on a 14-inch wheel, a plus-1 fitment from the 13-inch wheel of 165/70R13.

Size pages

Other comparisons with 165/70R13

Other comparisons with 165/65R14

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