Cannondale Synapse Cable Routing: Identify the Historical Guides and Di2 Ports

Cannondale Synapse cable routing on the historical carbon frame includes several small guides and ports with different jobs. A missing cover or an unfamiliar opening should lead to identification, rather than an improvised plug. Supplement 129387 provides a useful map for separating the rear-brake route from electronic-shifting fittings.

Locate the Cannondale Synapse cable routing document

Cannondale's road-manual index places this supplement with Synapse Carbon 2013–2016. Its routing page identifies a removable top-tube guide, KP063, for the rear brake cable. The instructions explain that installed brake-cable tension holds the guide in its opening and that it must be seated correctly.

That detail matters when discussing an apparently loose guide: its role cannot be understood by looking only at an empty frame port. Show the mechanic the actual cable arrangement and any removed pieces. The historical photograph provides model context, not a view inside the tube.

Keep mechanical housing and Di2 fittings distinct

The same page identifies rubber seals associated with KP298 for Shimano Di2 use and points out dedicated cabling openings. It also refers to ferrules on mechanical housing ends. These are different routing details; a seal that covers an electronic-wire opening is not automatically a substitute for a mechanical guide.

Prepare photographs of the relevant openings and list whether the bicycle currently uses mechanical or electronic shifting. If parts have been changed, preserve their model names and the previous service record. Avoid describing every small piece as a universal grommet when requesting a replacement.

A frame provision is not a complete conversion plan

Di2 markings in a frame diagram establish routing provisions in the documented design. They do not prove that every electronic group, battery location or control arrangement will work. A conversion needs a complete compatibility review for the proposed system and the particular frame.

If the task is simply renewing a mechanical cable, keep the work scoped to the applicable routing and hardware. Ask the mechanic which original part identifier or confirmed replacement is needed. Do not drill, enlarge or reshape a frame opening to fit a convenient generic piece.

For the broader identity check, the 2014 Carbon 6 guide distinguishes model naming from installed equipment. The Cannondale collection connects the related ownership material.

Frame-port FAQ

Does KP063 name a Di2 conversion kit?

No. In this routing section it identifies the removable top-tube brake-cable guide.

Does a Di2-labelled opening approve every electronic group?

No. Routing provision and complete component compatibility are different questions.

Can a generic rubber plug replace any missing guide?

Do not assume so. Identify the opening's function and obtain the appropriate frame hardware.

Clear Cannondale Synapse cable routing information keeps each guide's function and part reference attached to the correct frame generation and service task.

Manufacturer references: Synapse Carbon supplement 129387; Cannondale road-manual year index.