27x8.50R14 vs 245/60R16

245/60R16 is 0.57 in (14.6 mm) taller than 27x8.50R14, a +2.13% diameter difference. With the speedometer set for 27x8.50R14, an indicated 60 mph is 61.3 mph on 245/60R16.

Is this a safe swap?

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

By overall diameter alone, 245/60R16 falls inside the ±3% range commonly used as a guideline when replacing 27x8.50R14. 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.

27x8.50R14 vs 245/60R16 differences
Measurement	27x8.50R14	245/60R16	Difference	% diff
Overall diameter	27.00 in (685.8 mm)	27.57 in (700.4 mm)	+0.57 in (+14.6 mm)	+2.13%
Sidewall height	6.50 in (165.1 mm)	5.79 in (147.0 mm)	−0.71 in (−18.1 mm)	−10.96%
Section width	8.50 in (215.9 mm)	9.65 in (245.0 mm)	+1.15 in (+29.1 mm)	+13.48%
Circumference	84.82 in (2,154.5 mm)	86.63 in (2,200.4 mm)	+1.81 in (+45.9 mm)	+2.13%
Revolutions per mile	747	731	−16	−2.08%

True speed with the speedometer calibrated for 27x8.50R14
Indicated	Actual on 27x8.50R14	Actual on 245/60R16	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: 245/60R16 raises the vehicle by 0.29 in (7.3 mm) at the axle (half the +14.6 mm diameter difference).

245/60R16 is 0.57 in taller than 27x8.50R14 and 29 mm wider, a 2.13% difference in overall diameter.

With the speedometer calibrated for 27x8.50R14, an indicated 60 mph is actually 61.3 mph on 245/60R16, and revolutions per mile change from 747 to 731.

245/60R16 mounts on a 16-inch wheel, a plus-2 fitment from the 14-inch wheel of 27x8.50R14.

Size pages

Other comparisons with 27x8.50R14

Other comparisons with 245/60R16

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