jockey wheel hitting cassette

hillbillies
hillbillies Posts: 10
edited May 2011 in Workshop
Hi , when i go onto my top cog my chain & top jockey are rubbing on the cassette , can someone tell me how to stop this .Also how do you work out your correct chain length. thanks in advance

Comments

  • P_Tucker
    P_Tucker Posts: 1,878
    Chain's too long. The way you work out your chain length is to make it as long as it can be without the jockey wheel touching the cassette in the small ring and smallest sprocket.
  • benpinnick
    benpinnick Posts: 4,148
    I prefer to work the chain length out the other way - big / big. If you go tothe big chainring and big sprocket, and then measure the chain so it is 1 link longer than the absolute shortest it could possibly be while still working. This way you'll make sure you don't have a chain thats too short, while trimming any excess.
    A Flock of Birds
    + some other bikes.
  • andrewjoseph
    andrewjoseph Posts: 2,165
    hillbillies wrote:
    Hi , when i go onto my top cog my chain & top jockey are rubbing on the cassette , can someone tell me how to stop this .Also how do you work out your correct chain length. thanks in advance

    What do you mean by 'top cog', your lowest gear (biggest cog), or your highest gear (smallest cog).

    If you mean your lowest gear, you may have to adjust the B screw to pull the jockey wheel away from the cog.

    If you mean your highest gear, then take links out of chain as suggested above.
    --
    Burls Ti Tourer for Tarmac, Saracen aluminium full suss for trails
  • nicklouse
    nicklouse Posts: 50,673
    as above but also what mech and what size cog (if the Biggest sized one).
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • nakita222
    nakita222 Posts: 341
    b screw
  • P_Tucker
    P_Tucker Posts: 1,878
    benpinnick wrote:
    I prefer to work the chain length out the other way - big / big. If you go tothe big chainring and big sprocket, and then measure the chain so it is 1 link longer than the absolute shortest it could possibly be while still working. This way you'll make sure you don't have a chain thats too short, while trimming any excess.

    This is, of course, perfectly valid. I like to get full value for money out of my chains by ensuring that I use as many links as possible. Also, it means that if I decide to put the 27 on then I don't have to change chains.
  • hillbillies
    hillbillies Posts: 10
    B screw it is, thanks everyone.

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