225/70R15 vs 245/60R16

245/60R16 is 0.17 in (4.4 mm) taller than 225/70R15, a +0.63% diameter difference. With the speedometer set for 225/70R15, an indicated 60 mph is 60.4 mph on 245/60R16.

Is this a safe swap?

Diameter difference +0.63%: under 1%

By overall diameter alone, 245/60R16 is a near match for 225/70R15; 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.

225/70R15 vs 245/60R16 differences
Measurement	225/70R15	245/60R16	Difference	% diff
Overall diameter	27.40 in (696.0 mm)	27.57 in (700.4 mm)	+0.17 in (+4.4 mm)	+0.63%
Sidewall height	6.20 in (157.5 mm)	5.79 in (147.0 mm)	−0.41 in (−10.5 mm)	−6.67%
Section width	8.86 in (225.0 mm)	9.65 in (245.0 mm)	+0.79 in (+20.0 mm)	+8.89%
Circumference	86.08 in (2,186.5 mm)	86.63 in (2,200.4 mm)	+0.54 in (+13.8 mm)	+0.63%
Revolutions per mile	736	731	−5	−0.63%

True speed with the speedometer calibrated for 225/70R15
Indicated	Actual on 225/70R15	Actual on 245/60R16	Difference
30 mph	30.0 mph	30.2 mph	+0.2 mph
60 mph	60.0 mph	60.4 mph	+0.4 mph
75 mph	75.0 mph	75.5 mph	+0.5 mph

Ride-height change: 245/60R16 raises the vehicle by 0.09 in (2.2 mm) at the axle (half the +4.4 mm diameter difference).

245/60R16 is 0.17 in taller than 225/70R15 and 20 mm wider, a 0.63% difference in overall diameter.

With the speedometer calibrated for 225/70R15, an indicated 60 mph is actually 60.4 mph on 245/60R16, and revolutions per mile change from 736 to 731.

245/60R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 225/70R15.

Size pages

Other comparisons with 225/70R15

Other comparisons with 245/60R16

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