• Running Ultegra 6870.

    I'm sure this has been covered somewhere in this thread and I have seen numerous examples elsewhere but what are the latest recommendations for 'hacking' rear derailleur sprint shifters onto clip on aero extensions?

    Cateye buttons seem to be the most used but I have also seen which I think is tidier. http://nyvelocity.com/articles/equipment/ultegra-di2-tt-hack/

    Any advice appreciated.

  • Try hacking the SW600 climbing switch instead. I've done it, and it's fairly simple. Just needs a steady hand with a soldering iron.

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