Originally Posted by
canopus
How is the rear derailleur cable run? under or over the chain stay? I would stick with that position for the BB as well.
If it is routed under it looks cleaner but I like the cable positioning and length better when it is run on top.
This is what I would use to make that decision. If the chainstay braze-on is on top, run it above....on bottom, run it below.