Originally Posted by brandon98

Find definitive answers as to the following endless interwebz speculations:

-cog spacing and colors of spacers on the 571 and 571/2 cassette hubs. What colors mean what? Also, cog sources.

-840 derailleur and index shifter compatibility: is it Shimano, Mavic proprietary or old Dura-Ace proprietary? What modern Brifters can be used reliably?

-Bottom bracket tapers and symmetries for the 631 crankset: ISO and what length? Taper. Yes the 610 bottom bracket is nice, but not a lot of folks want to cut and chamfer a functional bottom bracket shell