Carlton Bale wrote:
scharebear wrote:
Have joined the forum just to ask this question. Do you think/know if this will work? I have Cervelo S5 with Ultegra Di2 STI shifters and have clipped-on aero bars and want to get shift buttons on aero extensions. Am thinking about splicing the Cateye remote buttons to an extra Shimano e-wire (cutting off one plug end) and plugging other end into second "input" on STI shifters. Thanks.
What you're describing won't work because an encoded signal needs to be sent to the input on the STI shifter. The cateye buttons by themselves won't do this.
One option would be to splice into the wires leading from the contact switches inside your brake levers; the wires are how the internal switches connect to the circuit that sends the encoded shift commands. This would be the cheapest option, but you'll need to open up your existing levers. You would use standard wires, not "Shimano e-wire." Space within the lever and routing of the additional wires to the aero bars may be difficult.
The second option would be to buy an new set of Ultegra Di2 brake levers, remove the circuit board, connect the Cateye buttons to those leads, and then connect the circuit board to the second input on the existing brake levers using a Shimano e-wire. In this setup, the new circuit board would send the encoded shift commands for the aero bar buttons and the cateye buttons would be the inputs. The existing levers would continue to use their own circuit board to send shift commands.
Here's a picture of the circuit "black box" and 3 wires that you will need to either splice into (option 1 - existing levers) or add (option 2 - dismantle new levers)
Is that kind of stuff doable with etap? that would result in a no blipbox setup?