Chain getting stuck between jockey wheel and mech cage

roubaixtom
roubaixtom Posts: 316
edited December 2016 in Workshop
Hi,

Recently my chain has been getting stuck between bottom jockey wheel and rear mech cage. Happens in most gear combinations.

Its a 105 5800 11 speed rear mech and the only thing i have noticed comparing to my other bikes is that the rear mech has play in it.

Anything else i should be looking for? why is this happening?

cheers
Tom

Comments

  • cougie
    cougie Posts: 22,512
    Have you changed the chain lately?
  • yes, I have
  • cougie
    cougie Posts: 22,512
    Did you keep it the same length as the old ones?
  • yes chain is the same length as the one on there before
  • cougie
    cougie Posts: 22,512
    Spring gone in the mech maybe? Have you done anything else to the bike?
  • havent done anything else that would effect rear shifting.

    Could it be the play at the mounting point pivot?
  • ridgerider
    ridgerider Posts: 2,852
    If its the bottom jockey gear its happen on, perhaps the chain is arriving at the mech at the wrong angle...is the rear mech aligned correctly? Does it happen in a particular gear combination?
    Half man, Half bike
  • cougie
    cougie Posts: 22,512
    And the rear mech screw is tight? So its not coming loose from the frame?

    Maybe photos will help?
  • Bobbinogs
    Bobbinogs Posts: 4,841
    Might be also worth having a look at the jockey wheels. I seem to get through a set in about 12-18 months. If the teeth are worn and/or there is too much play in the wheel then that may be leading to the chain slipping off. If you are unsure then just disassemble/reassemble and see. Only takes a about 5-10 minutes and they seem to benefit from a clean/relube once in a while anyway.
  • The Rookie
    The Rookie Posts: 27,812
    Agreed, jockey wheel bearings are the number1 suspect.
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.