Driving me nuts - fettling gears

puffingbilly
puffingbilly Posts: 189
edited November 2015 in Workshop
Ok so have just replaced my drive train ready for winter but can I get the gears to run smoothly......

Have a new 105 rear derailleur and cassette
New sram chain
New cables - inner and outer
7800 lever

Chain ring new middle last winter.

I am a pretty reasonable mechanic and have built all my bikes but never had this sort of problem and it's driving me nuts.

Any tips to try? I wondered if the older dura ace lever is compatible with a newer rear mech as had a similar problem with a sram lever and a Shimano mech.

Help!

Comments

  • Anonymous
    Anonymous Posts: 79,667
    Have you got a spacer behind the cassette if required?
  • puffingbilly
    puffingbilly Posts: 189
    Had a spacer but couldn't get the 12 so took it off and can now get all gears but if you get it running on the top three it then jumps or won't change on the smaller sprockets.
  • jermas
    jermas Posts: 484
    If it's the newer 5800 (11speed) rear derailleur you're using, then it won't be compatible with the lever (7800). It has a different pull ratio. 5600 / 5700 rear derailleur would be fine.
  • puffingbilly
    puffingbilly Posts: 189
    Put the old mech back on and perfect

    kama

    Cheers

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