215/75R14 vs 225/75R14

225/75R14 is 0.59 in (15.0 mm) taller than 215/75R14, a +2.21% diameter difference. With the speedometer set for 215/75R14, an indicated 60 mph is 61.3 mph on 225/75R14.

Is this a safe swap?

Diameter difference +2.21%: within the ±3% guideline

By overall diameter alone, 225/75R14 falls inside the ±3% range commonly used as a guideline when replacing 215/75R14. 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.

215/75R14 vs 225/75R14 differences
Measurement	215/75R14	225/75R14	Difference	% diff
Overall diameter	26.70 in (678.1 mm)	27.29 in (693.1 mm)	+0.59 in (+15.0 mm)	+2.21%
Sidewall height	6.35 in (161.3 mm)	6.64 in (168.8 mm)	+0.30 in (+7.5 mm)	+4.65%
Section width	8.46 in (215.0 mm)	8.86 in (225.0 mm)	+0.39 in (+10.0 mm)	+4.65%
Circumference	83.87 in (2,130.3 mm)	85.73 in (2,177.4 mm)	+1.86 in (+47.1 mm)	+2.21%
Revolutions per mile	755	739	−16	−2.16%

True speed with the speedometer calibrated for 215/75R14
Indicated	Actual on 215/75R14	Actual on 225/75R14	Difference
30 mph	30.0 mph	30.7 mph	+0.7 mph
60 mph	60.0 mph	61.3 mph	+1.3 mph
75 mph	75.0 mph	76.7 mph	+1.7 mph

Ride-height change: 225/75R14 raises the vehicle by 0.30 in (7.5 mm) at the axle (half the +15.0 mm diameter difference).

225/75R14 is 0.59 in taller than 215/75R14 and 10 mm wider, a 2.21% difference in overall diameter.

With the speedometer calibrated for 215/75R14, an indicated 60 mph is actually 61.3 mph on 225/75R14, and revolutions per mile change from 755 to 739.

Both sizes mount on 14-inch wheels.

Size pages

Other comparisons with 215/75R14

Other comparisons with 225/75R14

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