Chain slipping under load

Discussion in 'Bicycle Mechanics and Repairs' started by Joe, 12 Dec 2007.

  1. Joe

    Joe Über Member

    I switched my mountain bike back from singlespeed to geared a few weeks ago. Every now and then, usually when accelerating from a stop, the chain slips. What would be causing this? The chain and cassette are both new.
    Thanks in advance!
  2. Smokin Joe

    Smokin Joe Legendary Member

    Check the chain for a stiff link.
  3. Landslide

    Landslide Rare Migrant

    Called to the bar
    Worn chainring?
    Or a problem with the ratchets in your freewheel/hub?
  4. Steve Austin

    Steve Austin The Marmalade Kid

    broken freehub is my guess
  5. gbb

    gbb Legendary Member

    I go with Steve with the freehub.
    If the chain and cassette are new, it ony leaves the chainrings and freehub.
    As an example, FWIW, my Raleigh chainrings have done 3500 miles plus and are showing wear...but dont slip under load.

    Yet...the freehub on my Bianchi was slipping a bit a while ago...not that much mileage done...but then again, it hasnt done it for ages.
  6. andygates

    andygates New Member

    Joe, you're going to have to find some quiet road and eyeball it while riding.
  7. to do this if you dont know put the chain in the small ring and turn the peddles back words and if you see the chain jump thats it. To fix hold the chain on the side in both hands like you are trying to snap it and try and fiex it. If solved lube chain and job done

    have a look at the chainrings and cassette if your down there for any that look anything like shark's teeth. If so change it

    And to see if the freehub is broken or on the way out. Get hold of the cassette and see if it rocks from top to bottom if so you need a new one but take the wheel in to your LBS to see.

    p.s. freehubs start at £14 upword i think a xtr is around £59!
  8. OP

    Joe Über Member

    Thanks for the suggestions.;)
    I will have a good look over it on Friday...
  9. ColinJ

    ColinJ It's a puzzle ...

    You might even find that your rear derailleur is not set up properly and the chain is trying to jump to another sprocket.
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