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Crunch when changing cogs!

Discussion in 'Bicycle Mechanics and Repairs' started by geopat, 31 Mar 2008.

  1. geopat

    geopat Über Member

    Can someone advise what may be the cause of this?

    Change from top gear down a cog and chain crunches and sticks/loses drive for a second...don't want it happening too often as dangerous.

    Bike has just had new wheels fitted and a general check at LBS but does not seem right. There's a kind of ticking/clicking noise from wheels.

    Any advice welcome, Thanks
  2. Crackle

    Crackle Pah

    Do you mean on the front chainring or rear cassette.

    Either way it sounds like it just needs adjusting - check out


    They will tell how to adjust front and rear deraileurs.

    The clicking could be coming from the front derailleur. If it only happens when you turn the pedals, then that's likely. If it's happening all the time. could be the brakes. Does it stop when you apply the brake? If not that, I've known the wheel reflectors to make a clicking noise or a tyre catching a mudguard.
  3. Tynan

    Tynan Veteran

    straight back to LBS with a cold stare
  4. dudi

    dudi Senior Member

    Ipswich, Suffolk
    agree with tynan here.

    straight back and get them to finish the job they shoud have done in the first place.

    it's probably just in need of a little adjustment. but there's no reason for you to do it if the bike shop cocked it up in the first place.