TireSizesFinder

175/65R15 vs 205/50R16

205/50R16 is 0.11 in (2.9 mm) taller than 175/65R15, a +0.48% diameter difference. With the speedometer set for 175/65R15, an indicated 60 mph is 60.3 mph on 205/50R16.

Is this a safe swap?

Diameter difference +0.48%: under 1%

By overall diameter alone, 205/50R16 is a near match for 175/65R15; 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: 175/65R15 (23.96 in) vs 205/50R16 (24.07 in)175/65R1523.96 in × 6.89 in205/50R1624.07 in × 8.07 in
Side profile and tread width, drawn to the same scale.
175/65R15 vs 205/50R16 differences
Measurement175/65R15205/50R16Difference% diff
Overall diameter23.96 in (608.5 mm)24.07 in (611.4 mm)+0.11 in (+2.9 mm)+0.48%
Sidewall height4.48 in (113.8 mm)4.04 in (102.5 mm)−0.44 in (−11.2 mm)−9.89%
Section width6.89 in (175.0 mm)8.07 in (205.0 mm)+1.18 in (+30.0 mm)+17.14%
Circumference75.26 in (1,911.7 mm)75.62 in (1,920.8 mm)+0.36 in (+9.1 mm)+0.48%
Revolutions per mile842838−4−0.47%
True speed with the speedometer calibrated for 175/65R15
IndicatedActual on 175/65R15Actual on 205/50R16Difference
30 mph30.0 mph30.1 mph+0.1 mph
60 mph60.0 mph60.3 mph+0.3 mph
75 mph75.0 mph75.4 mph+0.4 mph

Ride-height change: 205/50R16 raises the vehicle by 0.06 in (1.4 mm) at the axle (half the +2.9 mm diameter difference).

205/50R16 is 0.11 in taller than 175/65R15 and 30 mm wider, a 0.48% difference in overall diameter.

With the speedometer calibrated for 175/65R15, an indicated 60 mph is actually 60.3 mph on 205/50R16, and revolutions per mile change from 842 to 838.

205/50R16 mounts on a 16-inch wheel, a plus-1 fitment from the 15-inch wheel of 175/65R15.

Size pages

Other comparisons with 175/65R15

Other comparisons with 205/50R16

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