215/70R16 vs 225/70R16

225/70R16 is 0.55 in (14.0 mm) taller than 215/70R16, a +1.98% diameter difference. With the speedometer set for 215/70R16, an indicated 60 mph is 61.2 mph on 225/70R16.

Is this a safe swap?

Diameter difference +1.98%: within the ±3% guideline

By overall diameter alone, 225/70R16 falls inside the ±3% range commonly used as a guideline when replacing 215/70R16. 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.

215/70R16 vs 225/70R16 differences
Measurement	215/70R16	225/70R16	Difference	% diff
Overall diameter	27.85 in (707.4 mm)	28.40 in (721.4 mm)	+0.55 in (+14.0 mm)	+1.98%
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	87.49 in (2,222.4 mm)	89.23 in (2,266.3 mm)	+1.73 in (+44.0 mm)	+1.98%
Revolutions per mile	724	710	−14	−1.94%

True speed with the speedometer calibrated for 215/70R16
Indicated	Actual on 215/70R16	Actual on 225/70R16	Difference
30 mph	30.0 mph	30.6 mph	+0.6 mph
60 mph	60.0 mph	61.2 mph	+1.2 mph
75 mph	75.0 mph	76.5 mph	+1.5 mph

Ride-height change: 225/70R16 raises the vehicle by 0.28 in (7.0 mm) at the axle (half the +14.0 mm diameter difference).

225/70R16 is 0.55 in taller than 215/70R16 and 10 mm wider, a 1.98% difference in overall diameter.

With the speedometer calibrated for 215/70R16, an indicated 60 mph is actually 61.2 mph on 225/70R16, and revolutions per mile change from 724 to 710.

Both sizes mount on 16-inch wheels.

Size pages

Other comparisons with 215/70R16

Other comparisons with 225/70R16

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