You can find all the replacement parts and accessories you need for your Cannondale bike at Escapa.
TheCannondale Bottom Bracket Cable Guide with Alloy Bracket is an original Cannondale replacement part for various road bikes with hydraulic disc brakes, including the CAAD12 Disc and Slate. For a similar version for the Synapse Alloy Disc
This updated version features a reinforced metal part that is stronger than the original part
