Chain Slipping

jerryfudd
jerryfudd Posts: 343
edited April 2013 in MTB workshop & tech
Hi,

Under heavy load im getting some chain slipping, im confident its not the chain or chain ring so wondering if the problem is with the cassette or jockey wheels - is there a way to narrow down which or just visual inspection with a bit of trial and error?

It doesnt happen has much on the larger cogs of the cassette but i just wonder if thats because there is less load? the jockey wheels are older than the cassette, chain is new and chain ring came from another bike due to an upgrade which didnt have the issue.

thanks,

Dan
2013 Cotic Bfe

Comments

  • zx6man
    zx6man Posts: 1,092
    new chain and old cassette is the culprit I reckon
  • supersonic
    supersonic Posts: 82,708
    Sounds like the cassette could be worn - new chin on old cogs often don't mesh if the cassette is far gone.
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  • nicklouse
    nicklouse Posts: 50,675
    watch it when trying to make it happen.

    jockey wheels have nothing to do with it.

    cassette or freebody.

    what did you do before this started?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • estampida
    estampida Posts: 1,008
    worn chainrings will slip the chain under power

    how do the teeth look?
  • jerryfudd
    jerryfudd Posts: 343
    nicklouse wrote:
    watch it when trying to make it happen

    sounds like a recipe for an accident :mrgreen:
    nicklouse wrote:
    what did you do before this started?

    ...not sure what you mean
    estampida wrote:
    how do the teeth look?

    have attached some pics :) ...its only on the smallest 3 cogs

    thanks
    2013 Cotic Bfe
  • The Rookie
    The Rookie Posts: 27,812
    jerryfudd wrote:
    nicklouse wrote:
    what did you do before this started?

    ...not sure what you mean
    Chains just starting to slip is rare, so what did you do just before it started happening?

    How tight is the chain, is there any crud in between the sprockets?
    Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.
  • estampida
    estampida Posts: 1,008
    so

    first back pedal the bike and look at the bottom jockey wheel, and watch the chain

    a stiff link in the chain will show up as it will not straighten correctly

    with that ruled out:

    pull the wheel out and give it a good clean and check the gear hanger, make sure its nice and straight

    then clean and lube the gear cable make sure its not sticking and check the mech for smooth movement

    wheel in, chain lube and re-do the indexing (and all of it the B, high & low screw)

    with that done any problems are left to the shifter, but it might just need a little pre summer love
  • jerryfudd
    jerryfudd Posts: 343
    thanks, i gave it the sprocket and chain a real good clean with the chain off and checked all the links but still happening.

    will check the back peddling - bar that think will have to get a mate to see if he can see whats going while im riding.

    dan
    2013 Cotic Bfe

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