1×9 chain keeps falling of ideas please

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  • 1×9 chain keeps falling of ideas please
  • stonemonkey
    Member

    running a 1×9 on my commuter with old ramped middle chain ring and a Race face bashguard, chain is pretty tight on an 08 Xt r mech dont think its a short cage , and the chain keeps dropping onto the bb side when in high (easy) gear. Chain to tight/ loose, anyone recomend a chain guide . Cheers

    nina
    Member

    just use an old front mech

    Check the chain line, try a non-ramped ring, some sort of chain guide (front mech style, DMR and Rohloff do one…or bodge a ft mech!)

    Try in that order.

    SSP

    Steve-Austin
    Member

    just use an old front mech

    TandemJeremy
    Member

    You need an unramped chainring to make 1×9 work. I tried it witha ramping ring and the chain would come off in anything but 3=7 gears. With an unramped chainring it stays on fine.

    desf
    Member

    Same as TJ. I use an unramped Blackspire DH ring from CRC and the chain has never come off.

    stonemonkey
    Member

    Got an unramped 32 but its 5 bolt and ive got 4 bolt race face cranks anyone got a 28 to 32 unramped 4 bolt

    Premier Icon speaker2animals
    Subscriber

    As Tandem Jeremy says, but maybe have a look at the chainline too. Make sure that sprocket 5 is as close to directly inline with the front ring as possible. If necessary get a new bottom bracket (assuming you’re using a square taper that you can get different axle lengths for).

    sv
    Member

    Go for the Chain Guide if you want to be sure. If its only for commuting the jump stop ‘might’ work!

    (1×9 user)

    TandemJeremy
    Member

    If its only for commuting unramped chainring does work – so hundreds of miles use tell me. Zero need for owt else
    KISS

    AdamM
    Member

    SJS Cycles sell really nice unramped chainrings for not very much money.

    2bit
    Member

    I had similar problems with my 1×9 set on my scandal 29er.
    Totally sorted & v v happy with a Rohloff chain guide – http://www.rohloff.de/en/products/speedhub/chain_guide_cc/

    stonemonkey
    Member

    Ok thanks for the help going to check the chain line , the rohloff chain guide is nice but this is going on my bike for £100 quid project so a 40 pound chain guide might be a bit to much . cheers people of stw

    Premier Icon sockpuppet
    Subscriber

    oh, and ‘high’ isn’t ‘easy’!

    stonemonkey
    Member

    yeah i was tying to remember which it was

    paule
    Member

    If you can get hold of some sort of clamp to go round the seattube, then I can send you a basic chain guide like the one I made for my 1×9. Very simple, just a 2″ long upside down L-section of nylon with a counterbored hole for a bolt to attach it to the clamp. Side of the L goes next to the rind, top of it above the ring.

    Works well so far, and that’s on rocks rather than just commuting.

    Send me an email if you want a pic of my one…

    Premier Icon oxym0r0n
    Subscriber

    Go for the Chain Guide if you want to be sure. If its only for commuting the jump stop ‘might’ work!

    The jump stop ‘does’ work – I’ve been riding with TheGingerOne on the Quantocks and Cwm Carn with his fully rigid death-machine and the chain didn’t jump off once!

    Pieface
    Member

    For free and for commuting, don’t use gear #9

    Pieface
    Member

    or what the others said

    TandemJeremy
    Member

    FFS – its only a commuter – just use an unramped chain ring and it will be fine. Got two bikes set up like this and its never an issue.

    stonemonkey
    Member

    paule my emails in profile cant find yours , am up at crookes in sheff are you local

    paule
    Member

    I’m in walkley, so very local… my email is paul.elliott AT rgfl.org

    Premier Icon allyharp
    Subscriber

    How well will an unramped chainring work with a long cage mech? Still skip?

    TandemJeremy
    Member

    Not for me. Shorten the chain using big / big plus two links and its fine using a normal long cage mech. Only for road use tho

    thomthumb
    Member

    n gear jump stop is the best solution.

    I’ve got a 33T ring that you could have for a fiver. bit worn but not too bad. i’ll dig it out for a photo anyway.

    stonemonkey
    Member

    Chhers mr thumb mail in profile

    ourkidsam
    Member

    Unramped chain ring and shorten your chain. Like your man TJ says

    mudsux
    Member

    i have a couple of n-gear jump stops available.
    i think in 31.8 and 34.9 sizing. email in profile if interested.

Viewing 29 posts - 1 through 29 (of 29 total)

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