Drivetrain

  • Aethos S-Works is compatible with electronic shifting only. Expert and Pro frames are compatible with either electronic or mechanical drivetrains.
  • 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: S-Works Frame

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). 


Mechanical Shifting: Front Derailleur Hanger Installation

The front derailleur wire is routed behind the derailleur hanger, which requires a backing plate mounted inside the frame (S201900005--see images below). The steps to install the backing plate are as follows:

  1. Begin with the shift cable sheath
  2. Thread a shift cable through the hanger backplate (A) and push it through the shift cable sheath
  3. Pull the cable end to bring the hanger backplate up against the inside of the frame
  4. Attach the derailleur hanger to the frame with a 2.5mm hex bolt in the bottom bolt hole
  5. Remove the shift cable and insert the top 2.5mm hex bolt. Torque both bolts to 2.0Nm (18 in-lbf)


Electronic Shifting and 1x Front Mechanical Shifting

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).


Di2 Cable Lengths

Location

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


Electronic Wiring Routing

Image of electronic routing -click to enlarge


Cable Routing: Expert and Pro Frames

Electronic drivetrains will use the same plugs and grommets as listed above for the S-Works 12R model.  A block off cover for the downtube tombstone is available (S186500003).

Mechanical drivetrains route the shifter housing into the downtube using the Tarmac SL6 tombstone (S186500004). Cable housing stops at the tombstone and bare cables run through the downtube to the BB cable guide (S206500011).  A cable stop bolts on to the chainstay near the dropout (S172000002).

Mechanical Cable Routing (Expert and Pro frames only)