Zipline Diameter Pulley Friction/ Rolling Resistance

[fluke70]

My zipline is 200 feet long built with 7/16" Stainless Steel Cable. Would 3/8" cable result in a faster ride with less noise from the trolley due to significantly less surface area for friction?

 

[OldEngr63]

Look at the contour of your pulley to see exactly what difference in contact area will result.

My initial reaction is to say that this will not make a lot of difference because I suspect that the noise is generated in the pulley bearing, and that would not be affected by changing the cable.