TireSizesFinder

205/50R16 vs 195/45R17

195/45R17 is 0.16 in (4.1 mm) shorter than 205/50R16, a −0.67% diameter difference. With the speedometer set for 205/50R16, an indicated 60 mph is 59.6 mph on 195/45R17.

Is this a safe swap?

Diameter difference −0.67%: under 1%

By overall diameter alone, 195/45R17 is a near match for 205/50R16; 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: 205/50R16 (24.07 in) vs 195/45R17 (23.91 in)205/50R1624.07 in × 8.07 in195/45R1723.91 in × 7.68 in
Side profile and tread width, drawn to the same scale.
205/50R16 vs 195/45R17 differences
Measurement205/50R16195/45R17Difference% diff
Overall diameter24.07 in (611.4 mm)23.91 in (607.3 mm)−0.16 in (−4.1 mm)−0.67%
Sidewall height4.04 in (102.5 mm)3.45 in (87.8 mm)−0.58 in (−14.7 mm)−14.39%
Section width8.07 in (205.0 mm)7.68 in (195.0 mm)−0.39 in (−10.0 mm)−4.88%
Circumference75.62 in (1,920.8 mm)75.11 in (1,907.9 mm)−0.51 in (−12.9 mm)−0.67%
Revolutions per mile838844+6+0.68%
True speed with the speedometer calibrated for 205/50R16
IndicatedActual on 205/50R16Actual on 195/45R17Difference
30 mph30.0 mph29.8 mph−0.2 mph
60 mph60.0 mph59.6 mph−0.4 mph
75 mph75.0 mph74.5 mph−0.5 mph

Ride-height change: 195/45R17 lowers the vehicle by 0.08 in (2.1 mm) at the axle (half the −4.1 mm diameter difference).

195/45R17 is 0.16 in shorter than 205/50R16 and 10 mm narrower, a 0.67% difference in overall diameter.

With the speedometer calibrated for 205/50R16, an indicated 60 mph is actually 59.6 mph on 195/45R17, and revolutions per mile change from 838 to 844.

195/45R17 mounts on a 17-inch wheel, a plus-1 fitment from the 16-inch wheel of 205/50R16.

Size pages

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