105 front mech with dura ace shifters, will it work?

petemadoc
petemadoc Posts: 2,331
edited April 2012 in Workshop
105 5600 front mech

with

Dura ace 7900 shifters

Yes I know it's a big mismatch and I will upgrade the front mech when one comes along and I have some cash but will these two work together or is the cable pull just completely different?

Comments

  • ugo.santalucia
    ugo.santalucia Posts: 28,255
    Yes
    left the forum March 2023
  • tonye_n
    tonye_n Posts: 832
    The cable pull is significantly different between 7900 shifters and any Shimano road front mech from other series (even 6700 front mech).

    However I suspect that with judicious adjustment of the limit screws you can get it to work fine.
    Just won't be as smooth as with 7900 front mech, and I would not shift it under load (i.e. changing b/w rings while going up hill).
  • petemadoc
    petemadoc Posts: 2,331
    Thanks, I did read that they are not compatible so I've shelled out a small fortune for a dura ace front mech

    Ouch
  • andy_wrx
    andy_wrx Posts: 3,396
    tonye_n wrote:
    The cable pull is significantly different between 7900 shifters and any Shimano road front mech from other series (even 6700 front mech).

    Really ?
    I understood that the gear cable pull was the same - it was the brake cable pull which was different ?
    (and hence wouldn't affect running the front mech here)
  • klep
    klep Posts: 158
    Up untill DA 7800, everything was just fine...

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