11 sp rear derailleur on 10 sp setup (shimano)

DiscoBoy
DiscoBoy Posts: 905
edited February 2014 in Workshop
Would an Ultegra 6800 rear derailleur work on a 10 speed (5700) setup?

I guess I'm asking three things:
Is the cable pull ratio the same?
Will a 10 speed chain be too wide and need swapping for an 11 speed?
Can the limit screws be adjusted to use it with a narrower cassette?
Red bikes are the fastest.

Comments

  • markhewitt1978
    markhewitt1978 Posts: 7,614
    I believe the cable pulls are different. Why would you want to?
  • DiscoBoy
    DiscoBoy Posts: 905
    markhewitt1978 wrote:
    I believe the cable pulls are different. Why would you want to?

    Why is that? This is true for the front derailleur, but I've seen no mention for the rear.

    No legitimate reason really. But my massive cage 105 derailleur bothers me a little, and an 11 speed derailleur would give more of an upgrade path than a 10 speed one.
    Red bikes are the fastest.
  • cycleclinic
    cycleclinic Posts: 6,865
    Cable pulls are different so the indexing simply will not work well.
    http://www.thecycleclinic.co.uk -wheel building and other stuff.

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