225/75R14 vs 225/65R16

225/65R16 is 0.23 in (5.8 mm) taller than 225/75R14, a +0.84% diameter difference. With the speedometer set for 225/75R14, an indicated 60 mph is 60.5 mph on 225/65R16.

Is this a safe swap?

Diameter difference +0.84%: under 1%

By overall diameter alone, 225/65R16 is a near match for 225/75R14; 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.

225/75R14 vs 225/65R16 differences
Measurement	225/75R14	225/65R16	Difference	% diff
Overall diameter	27.29 in (693.1 mm)	27.52 in (698.9 mm)	+0.23 in (+5.8 mm)	+0.84%
Sidewall height	6.64 in (168.8 mm)	5.76 in (146.3 mm)	−0.89 in (−22.5 mm)	−13.33%
Section width	8.86 in (225.0 mm)	8.86 in (225.0 mm)	0.00 in (0.0 mm)	0.00%
Circumference	85.73 in (2,177.4 mm)	86.44 in (2,195.7 mm)	+0.72 in (+18.2 mm)	+0.84%
Revolutions per mile	739	733	−6	−0.83%

True speed with the speedometer calibrated for 225/75R14
Indicated	Actual on 225/75R14	Actual on 225/65R16	Difference
30 mph	30.0 mph	30.3 mph	+0.3 mph
60 mph	60.0 mph	60.5 mph	+0.5 mph
75 mph	75.0 mph	75.6 mph	+0.6 mph

Ride-height change: 225/65R16 raises the vehicle by 0.11 in (2.9 mm) at the axle (half the +5.8 mm diameter difference).

225/65R16 is 0.23 in taller than 225/75R14 and the same width, a 0.84% difference in overall diameter.

With the speedometer calibrated for 225/75R14, an indicated 60 mph is actually 60.5 mph on 225/65R16, and revolutions per mile change from 739 to 733.

225/65R16 mounts on a 16-inch wheel, a plus-2 fitment from the 14-inch wheel of 225/75R14.

Size pages

Other comparisons with 225/75R14

Other comparisons with 225/65R16

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