So I have a new-to-me bike and I need to replace the front derailleur cable. It's the first time I've had to do this on a bike with internal routing. The cable enters the frame at the top of the down tube, exits briefly under the BB, where it routes OUTSIDE a removable insert, re-enters the same hole and emerges through a much smaller hole at the top of the BB, whence to the derailleur. Of course after futzing around too long I ended up with the cable out of the frame.
Anyway, it looks like the key to threading the thing is that the large insert under the BB has to come out. However, the well-adjusted rear shift cable routes around the same insert. So my question is, is there some trick to removing the insert and replacing the FD cable without having to undo the RD cable (and possibly be forced into replacing it, too) at the same time? Bike is a 4yo Cervelo R3.
Anyway, it looks like the key to threading the thing is that the large insert under the BB has to come out. However, the well-adjusted rear shift cable routes around the same insert. So my question is, is there some trick to removing the insert and replacing the FD cable without having to undo the RD cable (and possibly be forced into replacing it, too) at the same time? Bike is a 4yo Cervelo R3.