As I see it , front shifters shove the chain from one plane to another. the chain ring being a disc with teeth on its edge.
Never touched any Di2 stuff, this area does not spend that kind of money on bicycles ..
Braze-on FD means , pretty much leave it as is , or sell the bike and get something that better suits your needs..
since you are un satisfied with what you have.
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Last edited by fietsbob; 08-16-17 at 08:41 AM.