205/75R14 vs 215/65R15

215/65R15 is 0.10 in (2.6 mm) shorter than 205/75R14, a −0.39% diameter difference. With the speedometer set for 205/75R14, an indicated 60 mph is 59.8 mph on 215/65R15.

Is this a safe swap?

Diameter difference −0.39%: under 1%

By overall diameter alone, 215/65R15 is a near match for 205/75R14; 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.

205/75R14 vs 215/65R15 differences
Measurement	205/75R14	215/65R15	Difference	% diff
Overall diameter	26.11 in (663.1 mm)	26.00 in (660.5 mm)	−0.10 in (−2.6 mm)	−0.39%
Sidewall height	6.05 in (153.8 mm)	5.50 in (139.8 mm)	−0.55 in (−14.0 mm)	−9.11%
Section width	8.07 in (205.0 mm)	8.46 in (215.0 mm)	+0.39 in (+10.0 mm)	+4.88%
Circumference	82.02 in (2,083.2 mm)	81.69 in (2,075.0 mm)	−0.32 in (−8.2 mm)	−0.39%
Revolutions per mile	773	776	+3	+0.39%

True speed with the speedometer calibrated for 205/75R14
Indicated	Actual on 205/75R14	Actual on 215/65R15	Difference
30 mph	30.0 mph	29.9 mph	−0.1 mph
60 mph	60.0 mph	59.8 mph	−0.2 mph
75 mph	75.0 mph	74.7 mph	−0.3 mph

Ride-height change: 215/65R15 lowers the vehicle by 0.05 in (1.3 mm) at the axle (half the −2.6 mm diameter difference).

215/65R15 is 0.10 in shorter than 205/75R14 and 10 mm wider, a 0.39% difference in overall diameter.

With the speedometer calibrated for 205/75R14, an indicated 60 mph is actually 59.8 mph on 215/65R15, and revolutions per mile change from 773 to 776.

215/65R15 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 215/65R15

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