Reply to "Gearbox ratios."

Rick Bell (Guest)

As a matter of general interest when calculating correct road speeds. The Yoko 345 x 35 x 15 diameter is 23.75 inches when fitted to original campy wheels, which gives a road speed of 71 mph at 3000 rpm with a 4.22:1 ZF final drive. Too many revs for comfortable freeway cruising. Top speed of around 140. Unacceptable. Thats why I am considering changing the final drive to a 3.77 or even a 3.4 (which I believe can be sourced). Any further input from anyone who has done cog/final drive changes is most welcome.

9/14/029:47 AM

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