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Chain trying to jump to another gear on backpedal

roger645roger645 Posts: 111
edited January 2010 in The workshop
Had my bike serviced recently and new chain and cassette fitted. When I backpedal the chain try's to jump to another gear on the cassette and jams. Is this an adjustment problem? Set up is 105 with Ultegra rear dérailleur.
Current Steed: 02 Marin Tiburon

Posts

  • cougiecougie Posts: 22,512
    Slightly misaligned I would say - you should be able to fix this with adjusting the collar on the rear mech - clockwise or anticlockwise - whichever way it is to ensure that the jockey wheels are directly below the sprocket you want.

    But dont back pedal more than you have to.
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