• Aethos S-Works is compatible with electronic shifting only.
  • Maximum chainring size: 1x 52t or 2x 55t. 
  • A new lightweight rear derailleur hanger has been developed (S206000001). The front derailleur hanger requires installation of a backing plate in the frame.  See below under Cable Routing.
  • The Aethos frame uses a threaded BSA 68mm bottom bracket, which is compatible with many aftermarket bottom brackets.

Cable Routing

The Aethos S-Works frame is compatible with electronic shifting and disc brakes only. The electronic shifting wire should follow the rear brake hose from the cockpit into the non-drive side of the headtube using grommet (S179900013). Use foam churros to control cable rattle in the downtube (S149900018). There is a plug for the rear derailleur cable exit (S209900054). The front derailleur wire is routed behind the derailleur hanger, which requires a backing plate mounted inside the frame (S201900005--see images below). eTap models can use a block off plug on the chainstay (S179900015). For bikes using a 1X drivetrain, a block off plate for the front derailleur hanger is shared with the Tarmac SL7 (S201900002).

Image of front derailleur hanger installation -click to enlarge

Di2 Cable Lengths


Length (mm)

B Junction to A Junction (Bar end)1400
B Junction to Rear Derailleur750
B Junction to Front Derailleur500
B Junction to Battery (Seatpost)1000
Left Shifter to Right Shifter750

Image of electronic routing -click to enlarge