• Apologies for slow reply have been hiding in a tent. It is a band on mech that's needed, the seat tube is 28.6mm.

    James, di2 cable length is dependent on a number of factors, so need to know how wide your bars are, how long your stem is and how many spacers you are going to run first.

  • Sorry forgot to respond.

    They would have, but I realised that you are using the new fancy hidden junction box, and I don't know how that measures up. I have a build coming up and can let you know once I've done it? Just don't want to give wrong lengths...

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