195/70R14 vs 195/65R15

195/65R15 is 0.23 in (5.9 mm) taller than 195/70R14, a +0.94% diameter difference. With the speedometer set for 195/70R14, an indicated 60 mph is 60.6 mph on 195/65R15.

Is this a safe swap?

Diameter difference +0.94%: under 1%

By overall diameter alone, 195/65R15 is a near match for 195/70R14; the speedometer changes by less than 1%. 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.

195/70R14 vs 195/65R15 differences
Measurement	195/70R14	195/65R15	Difference	% diff
Overall diameter	24.75 in (628.6 mm)	24.98 in (634.5 mm)	+0.23 in (+5.9 mm)	+0.94%
Sidewall height	5.37 in (136.5 mm)	4.99 in (126.8 mm)	−0.38 in (−9.7 mm)	−7.14%
Section width	7.68 in (195.0 mm)	7.68 in (195.0 mm)	0.00 in (0.0 mm)	0.00%
Circumference	77.75 in (1,974.8 mm)	78.48 in (1,993.3 mm)	+0.73 in (+18.5 mm)	+0.94%
Revolutions per mile	815	807	−8	−0.93%

True speed with the speedometer calibrated for 195/70R14
Indicated	Actual on 195/70R14	Actual on 195/65R15	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	75.7 mph	+0.7 mph

Ride-height change: 195/65R15 raises the vehicle by 0.12 in (3.0 mm) at the axle (half the +5.9 mm diameter difference).

195/65R15 is 0.23 in taller than 195/70R14 and the same width, a 0.94% difference in overall diameter.

With the speedometer calibrated for 195/70R14, an indicated 60 mph is actually 60.6 mph on 195/65R15, and revolutions per mile change from 815 to 807.

195/65R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 195/70R14.

Size pages

Other comparisons with 195/70R14

Other comparisons with 195/65R15

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