185/70R14 vs 195/60R15

195/60R15 is 0.02 in (0.4 mm) taller than 185/70R14, a +0.07% diameter difference. With the speedometer set for 185/70R14, an indicated 60 mph is 60.0 mph on 195/60R15.

Is this a safe swap?

Diameter difference +0.07%: under 1%

By overall diameter alone, 195/60R15 is a near match for 185/70R14; 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.

185/70R14 vs 195/60R15 differences
Measurement	185/70R14	195/60R15	Difference	% diff
Overall diameter	24.20 in (614.6 mm)	24.21 in (615.0 mm)	+0.02 in (+0.4 mm)	+0.07%
Sidewall height	5.10 in (129.5 mm)	4.61 in (117.0 mm)	−0.49 in (−12.5 mm)	−9.65%
Section width	7.28 in (185.0 mm)	7.68 in (195.0 mm)	+0.39 in (+10.0 mm)	+5.41%
Circumference	76.02 in (1,930.8 mm)	76.07 in (1,932.1 mm)	+0.05 in (+1.3 mm)	+0.07%
Revolutions per mile	834	833	−1	−0.07%

True speed with the speedometer calibrated for 185/70R14
Indicated	Actual on 185/70R14	Actual on 195/60R15
30 mph	30.0 mph	30.0 mph
60 mph	60.0 mph	60.0 mph
75 mph	75.0 mph	75.0 mph

Ride-height change: 195/60R15 raises the vehicle by 0.01 in (0.2 mm) at the axle (half the +0.4 mm diameter difference).

195/60R15 is 0.02 in taller than 185/70R14 and 10 mm wider, a 0.07% difference in overall diameter.

With the speedometer calibrated for 185/70R14, an indicated 60 mph is actually 60.0 mph on 195/60R15, and revolutions per mile change from 834 to 833.

195/60R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 185/70R14.

Size pages

Other comparisons with 185/70R14

Other comparisons with 195/60R15

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