215/85R16 vs 245/75R16

245/75R16 is 0.08 in (2.0 mm) taller than 215/85R16, a +0.26% diameter difference. With the speedometer set for 215/85R16, an indicated 60 mph is 60.2 mph on 245/75R16.

Is this a safe swap?

Diameter difference +0.26%: under 1%

By overall diameter alone, 245/75R16 is a near match for 215/85R16; 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.

215/85R16 vs 245/75R16 differences
Measurement	215/85R16	245/75R16	Difference	% diff
Overall diameter	30.39 in (771.9 mm)	30.47 in (773.9 mm)	+0.08 in (+2.0 mm)	+0.26%
Sidewall height	7.19 in (182.8 mm)	7.23 in (183.8 mm)	+0.04 in (+1.0 mm)	+0.55%
Section width	8.46 in (215.0 mm)	9.65 in (245.0 mm)	+1.18 in (+30.0 mm)	+13.95%
Circumference	95.47 in (2,425.0 mm)	95.72 in (2,431.3 mm)	+0.25 in (+6.3 mm)	+0.26%
Revolutions per mile	664	662	−2	−0.26%

True speed with the speedometer calibrated for 215/85R16
Indicated	Actual on 215/85R16	Actual on 245/75R16	Difference
30 mph	30.0 mph	30.1 mph	+0.1 mph
60 mph	60.0 mph	60.2 mph	+0.2 mph
75 mph	75.0 mph	75.2 mph	+0.2 mph

Ride-height change: 245/75R16 raises the vehicle by 0.04 in (1.0 mm) at the axle (half the +2.0 mm diameter difference).

245/75R16 is 0.08 in taller than 215/85R16 and 30 mm wider, a 0.26% difference in overall diameter.

With the speedometer calibrated for 215/85R16, an indicated 60 mph is actually 60.2 mph on 245/75R16, and revolutions per mile change from 664 to 662.

Both sizes mount on 16-inch wheels.

Size pages

Other comparisons with 215/85R16

Other comparisons with 245/75R16

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