205/75R14 vs 195/70R15

195/70R15 is 0.36 in (9.1 mm) shorter than 205/75R14, a −1.37% diameter difference. With the speedometer set for 205/75R14, an indicated 60 mph is 59.2 mph on 195/70R15.

Is this a safe swap?

Diameter difference −1.37%: within the ±3% guideline

By overall diameter alone, 195/70R15 falls inside the ±3% range commonly used as a guideline when replacing 205/75R14. 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.

205/75R14 vs 195/70R15 differences
Measurement	205/75R14	195/70R15	Difference	% diff
Overall diameter	26.11 in (663.1 mm)	25.75 in (654.0 mm)	−0.36 in (−9.1 mm)	−1.37%
Sidewall height	6.05 in (153.8 mm)	5.37 in (136.5 mm)	−0.68 in (−17.2 mm)	−11.22%
Section width	8.07 in (205.0 mm)	7.68 in (195.0 mm)	−0.39 in (−10.0 mm)	−4.88%
Circumference	82.02 in (2,083.2 mm)	80.89 in (2,054.6 mm)	−1.13 in (−28.6 mm)	−1.37%
Revolutions per mile	773	783	+11	+1.39%

True speed with the speedometer calibrated for 205/75R14
Indicated	Actual on 205/75R14	Actual on 195/70R15	Difference
30 mph	30.0 mph	29.6 mph	−0.4 mph
60 mph	60.0 mph	59.2 mph	−0.8 mph
75 mph	75.0 mph	74.0 mph	−1.0 mph

Ride-height change: 195/70R15 lowers the vehicle by 0.18 in (4.5 mm) at the axle (half the −9.1 mm diameter difference).

195/70R15 is 0.36 in shorter than 205/75R14 and 10 mm narrower, a 1.37% difference in overall diameter.

With the speedometer calibrated for 205/75R14, an indicated 60 mph is actually 59.2 mph on 195/70R15, and revolutions per mile change from 773 to 783.

195/70R15 mounts on a 15-inch wheel, a plus-1 fitment from the 14-inch wheel of 205/75R14.

Size pages

Other comparisons with 205/75R14

Other comparisons with 195/70R15

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