Top Swing vs Bottom Swing
I understand the difference between top pull/down pull, but I don't understand the difference between top swing and bottom swing. I am building a cross bike that will have 39/46 chainrings. Would I be at an advantage by using one or the other? The frame is a Ridley Crossbow and has a cable guide on the back of the seat tube. I guess that makes it so I need a bottom pull. Not sure about that either. I also see that Shimano has dual pull derailleius. What do you think would be best to put on the bike? Thanks for any help. Ron