215/70R14 vs 225/70R14

225/70R14 is 0.55 in (14.0 mm) taller than 215/70R14, a +2.13% diameter difference. With the speedometer set for 215/70R14, an indicated 60 mph is 61.3 mph on 225/70R14.

Is this a safe swap?

Diameter difference +2.13%: within the ±3% guideline

By overall diameter alone, 225/70R14 falls inside the ±3% range commonly used as a guideline when replacing 215/70R14. 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.

215/70R14 vs 225/70R14 differences
Measurement	215/70R14	225/70R14	Difference	% diff
Overall diameter	25.85 in (656.6 mm)	26.40 in (670.6 mm)	+0.55 in (+14.0 mm)	+2.13%
Sidewall height	5.93 in (150.5 mm)	6.20 in (157.5 mm)	+0.28 in (+7.0 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	81.21 in (2,062.8 mm)	82.94 in (2,106.8 mm)	+1.73 in (+44.0 mm)	+2.13%
Revolutions per mile	780	764	−16	−2.09%

True speed with the speedometer calibrated for 215/70R14
Indicated	Actual on 215/70R14	Actual on 225/70R14	Difference
30 mph	30.0 mph	30.6 mph	+0.6 mph
60 mph	60.0 mph	61.3 mph	+1.3 mph
75 mph	75.0 mph	76.6 mph	+1.6 mph

Ride-height change: 225/70R14 raises the vehicle by 0.28 in (7.0 mm) at the axle (half the +14.0 mm diameter difference).

225/70R14 is 0.55 in taller than 215/70R14 and 10 mm wider, a 2.13% difference in overall diameter.

With the speedometer calibrated for 215/70R14, an indicated 60 mph is actually 61.3 mph on 225/70R14, and revolutions per mile change from 780 to 764.

Both sizes mount on 14-inch wheels.

Size pages

Other comparisons with 215/70R14

Other comparisons with 225/70R14

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