whats the secret?
seems theres not enough swing in the pivots to take up the chain slack running a 53/39 ring combo.
ive optimized chain length, b-screw position, everything i know to do on the rear mech.
if adjusted to work with the 53 there ends up being slack on the 39. if adjusted to work with the 39 there ends up being insufficient chain length for the 53.
ive resorted to running 42 small rings, but since 39s exist....i have to think it can be made to work!