TireSizesFinder

27x8.50R14 vs 225/65R16

225/65R16 is 0.52 in (13.1 mm) taller than 27x8.50R14, a +1.91% diameter difference. With the speedometer set for 27x8.50R14, an indicated 60 mph is 61.1 mph on 225/65R16.

Is this a safe swap?

Diameter difference +1.91%: within the ±3% guideline

By overall diameter alone, 225/65R16 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.

To-scale drawing: 27x8.50R14 (27.00 in) vs 225/65R16 (27.52 in)27x8.50R1427.00 in × 8.50 in225/65R1627.52 in × 8.86 in
Side profile and tread width, drawn to the same scale.
27x8.50R14 vs 225/65R16 differences
Measurement27x8.50R14225/65R16Difference% diff
Overall diameter27.00 in (685.8 mm)27.52 in (698.9 mm)+0.52 in (+13.1 mm)+1.91%
Sidewall height6.50 in (165.1 mm)5.76 in (146.3 mm)−0.74 in (−18.8 mm)−11.42%
Section width8.50 in (215.9 mm)8.86 in (225.0 mm)+0.36 in (+9.1 mm)+4.21%
Circumference84.82 in (2,154.5 mm)86.44 in (2,195.7 mm)+1.62 in (+41.2 mm)+1.91%
Revolutions per mile747733−14−1.87%
True speed with the speedometer calibrated for 27x8.50R14
IndicatedActual on 27x8.50R14Actual on 225/65R16Difference
30 mph30.0 mph30.6 mph+0.6 mph
60 mph60.0 mph61.1 mph+1.1 mph
75 mph75.0 mph76.4 mph+1.4 mph

Ride-height change: 225/65R16 raises the vehicle by 0.26 in (6.6 mm) at the axle (half the +13.1 mm diameter difference).

225/65R16 is 0.52 in taller than 27x8.50R14 and 9 mm wider, a 1.91% difference in overall diameter.

With the speedometer calibrated for 27x8.50R14, an indicated 60 mph is actually 61.1 mph on 225/65R16, and revolutions per mile change from 747 to 733.

225/65R16 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 225/65R16

Source: Calculated from standard tire geometry formulas. Verified . How these numbers are calculated.