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Chain Slipping

  • 12-04-2010 11:13am
    #1
    Bluefoam
    Registered Users, Registered Users 2 Posts: 7,748 ✭✭✭


    I replaced the chain on my bike & have found that it is slipping - the gears need tuning, but I'm a bit wary of the slippage - should the cogs have been replaced at the same time?


Comments

  • #2
    sy
    Registered Users, Registered Users 2 Posts: 1,653 ✭✭✭sy


    Sounds like you need to change the block aswell. How many kms on it?


  • #3
    Bluefoam
    Registered Users, Registered Users 2 Posts: 7,748 ✭✭✭Bluefoam


    sy wrote: »
    Sounds like you need to change the block aswell. How many kms on it?

    The cogs are about 4 years old, but only get weekend use - its a mountain bike.


  • #4
    cdaly_
    Registered Users, Registered Users 2 Posts: 6,440 ✭✭✭cdaly_


    If the worn chain was left on for too long, the sprockets (cogs) will have been worn and the new chain will slip. If you change a worn chain soon enough you'll get 3-ish chains out of one cassette. If you leave it too long the cassette must be changed at the same time.


  • #5
    Bluefoam
    Registered Users, Registered Users 2 Posts: 7,748 ✭✭✭Bluefoam


    The old chain wasn't necessarily worn (at least thats not why I changed it) it was mangled/twisted


  • #6
    Golfanatic
    Registered Users, Registered Users 2 Posts: 439 ✭✭Golfanatic


    when you change the chain you MUST change the cassete. the cassete wears with the chain so it will mesh differently with the old cassete. itll be worse than an old caasete and new chain.


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  • #7
    Golfanatic
    Registered Users, Registered Users 2 Posts: 439 ✭✭Golfanatic


    how old was the chain if it was say more thank 75 percent worn it still wont mesh properly


  • #8
    Lumen
    Registered Users, Registered Users 2 Posts: 31,166 ✭✭✭✭Lumen


    Golfanatic wrote: »
    when you change the chain you MUST change the cassete

    Only if the chain is so stretched that it has worn out the cassette.


  • #9
    Golfanatic
    Registered Users, Registered Users 2 Posts: 439 ✭✭Golfanatic


    how old was the chain? if you still have it you can measure it to see. get a 12 inch ruler and line the 0inch mark with a pin. every link (inch of chain) each second pin should line up with the inch mark with the ruler.if the twelth inch mark is offline it is worn. however if it is not perfetly lined up it is nearly worn completely

    http://www.sheldonbrown.com/chains.html helpfo info


  • #10
    Golfanatic
    Registered Users, Registered Users 2 Posts: 439 ✭✭Golfanatic


    sorry wrong link give us a second


  • #11
    Golfanatic
    Registered Users, Registered Users 2 Posts: 439 ✭✭Golfanatic


    couldnt find it
    http://bicycletutor.com/chain-wear/
    this might do


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  • #12
    sy
    Registered Users, Registered Users 2 Posts: 1,653 ✭✭✭sy


    cdaly_ wrote: »
    If the worn chain was left on for too long, the sprockets (cogs) will have been worn and the new chain will slip. If you change a worn chain soon enough you'll get 3-ish chains out of one cassette. If you leave it too long the cassette must be changed at the same time.
    +1


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