TireSizesFinder

185/70R14 vs 205/50R16

205/50R16 is 0.13 in (3.2 mm) shorter than 185/70R14, a −0.52% diameter difference. With the speedometer set for 185/70R14, an indicated 60 mph is 59.7 mph on 205/50R16.

Is this a safe swap?

Diameter difference −0.52%: under 1%

By overall diameter alone, 205/50R16 is a near match for 185/70R14; 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: 185/70R14 (24.20 in) vs 205/50R16 (24.07 in)185/70R1424.20 in × 7.28 in205/50R1624.07 in × 8.07 in
Side profile and tread width, drawn to the same scale.
185/70R14 vs 205/50R16 differences
Measurement185/70R14205/50R16Difference% diff
Overall diameter24.20 in (614.6 mm)24.07 in (611.4 mm)−0.13 in (−3.2 mm)−0.52%
Sidewall height5.10 in (129.5 mm)4.04 in (102.5 mm)−1.06 in (−27.0 mm)−20.85%
Section width7.28 in (185.0 mm)8.07 in (205.0 mm)+0.79 in (+20.0 mm)+10.81%
Circumference76.02 in (1,930.8 mm)75.62 in (1,920.8 mm)−0.40 in (−10.1 mm)−0.52%
Revolutions per mile834838+4+0.52%
True speed with the speedometer calibrated for 185/70R14
IndicatedActual on 185/70R14Actual on 205/50R16Difference
30 mph30.0 mph29.8 mph−0.2 mph
60 mph60.0 mph59.7 mph−0.3 mph
75 mph75.0 mph74.6 mph−0.4 mph

Ride-height change: 205/50R16 lowers the vehicle by 0.06 in (1.6 mm) at the axle (half the −3.2 mm diameter difference).

205/50R16 is 0.13 in shorter than 185/70R14 and 20 mm wider, a 0.52% difference in overall diameter.

With the speedometer calibrated for 185/70R14, an indicated 60 mph is actually 59.7 mph on 205/50R16, and revolutions per mile change from 834 to 838.

205/50R16 mounts on a 16-inch wheel, a plus-2 fitment from the 14-inch wheel of 185/70R14.

Size pages

Other comparisons with 185/70R14

Other comparisons with 205/50R16

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