27x8.50R14 vs 235/60R16

235/60R16 is 0.10 in (2.6 mm) taller than 27x8.50R14, a +0.38% diameter difference. With the speedometer set for 27x8.50R14, an indicated 60 mph is 60.2 mph on 235/60R16.

Is this a safe swap?

Diameter difference +0.38%: under 1%

By overall diameter alone, 235/60R16 is a near match for 27x8.50R14; 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.

27x8.50R14 vs 235/60R16 differences
Measurement	27x8.50R14	235/60R16	Difference	% diff
Overall diameter	27.00 in (685.8 mm)	27.10 in (688.4 mm)	+0.10 in (+2.6 mm)	+0.38%
Sidewall height	6.50 in (165.1 mm)	5.55 in (141.0 mm)	−0.95 in (−24.1 mm)	−14.60%
Section width	8.50 in (215.9 mm)	9.25 in (235.0 mm)	+0.75 in (+19.1 mm)	+8.85%
Circumference	84.82 in (2,154.5 mm)	85.14 in (2,162.7 mm)	+0.32 in (+8.2 mm)	+0.38%
Revolutions per mile	747	744	−3	−0.38%

True speed with the speedometer calibrated for 27x8.50R14
Indicated	Actual on 27x8.50R14	Actual on 235/60R16	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	75.3 mph	+0.3 mph

Ride-height change: 235/60R16 raises the vehicle by 0.05 in (1.3 mm) at the axle (half the +2.6 mm diameter difference).

235/60R16 is 0.10 in taller than 27x8.50R14 and 19 mm wider, a 0.38% difference in overall diameter.

With the speedometer calibrated for 27x8.50R14, an indicated 60 mph is actually 60.2 mph on 235/60R16, and revolutions per mile change from 747 to 744.

235/60R16 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 235/60R16

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