• I got mixed up... I would be looking for 11 speed but I guess for front mech it doesn't matter much as long as it works with 6870 shifters. Hmm... internal battery and cables...

  • As far as I’m aware (from reading the internet) a 6770 front and 6870 rear won’t work together, mechs need to be the same series - 6770 shifters will work for 11speed though.
    I’m about to build a bike with external battery as over the winter it’s less practical to bring a wet/muddy bike into the house to charge it as I had to with internal battery bike, just a thought... plus the charger for internal batteries are overpriced at £60 odd!

  • Ah thanks. I've got an internal battery on my other bike so it's not a concern. Found a guy online willing to split a used groupset and just sell mechs and shifters

  • I'm not sure about that. I have a R8000 rear mech working just fine with the older series front mech. I've never updated firmware.

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