TireSizesFinder

225/50R15 vs 205/50R16

205/50R16 is 0.21 in (5.4 mm) taller than 225/50R15, a +0.89% diameter difference. With the speedometer set for 225/50R15, an indicated 60 mph is 60.5 mph on 205/50R16.

Is this a safe swap?

Diameter difference +0.89%: under 1%

By overall diameter alone, 205/50R16 is a near match for 225/50R15; the speedometer changes by less than 1%. This check uses diameter only. It does not assess load index, speed rating, wheel width or clearance.

To-scale drawing: 225/50R15 (23.86 in) vs 205/50R16 (24.07 in)225/50R1523.86 in × 8.86 in205/50R1624.07 in × 8.07 in
Side profile and tread width, drawn to the same scale.
225/50R15 vs 205/50R16 differences
Measurement225/50R15205/50R16Difference% diff
Overall diameter23.86 in (606.0 mm)24.07 in (611.4 mm)+0.21 in (+5.4 mm)+0.89%
Sidewall height4.43 in (112.5 mm)4.04 in (102.5 mm)−0.39 in (−10.0 mm)−8.89%
Section width8.86 in (225.0 mm)8.07 in (205.0 mm)−0.79 in (−20.0 mm)−8.89%
Circumference74.95 in (1,903.8 mm)75.62 in (1,920.8 mm)+0.67 in (+17.0 mm)+0.89%
Revolutions per mile845838−7−0.88%
True speed with the speedometer calibrated for 225/50R15
IndicatedActual on 225/50R15Actual on 205/50R16Difference
30 mph30.0 mph30.3 mph+0.3 mph
60 mph60.0 mph60.5 mph+0.5 mph
75 mph75.0 mph75.7 mph+0.7 mph

Ride-height change: 205/50R16 raises the vehicle by 0.11 in (2.7 mm) at the axle (half the +5.4 mm diameter difference).

205/50R16 is 0.21 in taller than 225/50R15 and 20 mm narrower, a 0.89% difference in overall diameter.

With the speedometer calibrated for 225/50R15, an indicated 60 mph is actually 60.5 mph on 205/50R16, and revolutions per mile change from 845 to 838.

205/50R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 225/50R15.

Size pages

Other comparisons with 225/50R15

Other comparisons with 205/50R16

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