Chain on a full sus

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  • Chain on a full sus
  • How does one set the length? On a hardtail I’d wrap it round the two biggest cogs (and chain device!) and add a couple of links, but that doesn’t allow for suspension travel…

    Conan257
    Member

    Exactly the same, but add a few more links.

    If you want to check, remove the shock and move the suspension to its limits.

    Cool cheers. That was kinda what I figured. Better too long than too short I guess…

    Best to let the air out of your shock and work out how much chain growth you get. Some frames get a huge amount. I think my old SC Bullit was about 3 inches!

    That’s easy enough to do. I’d sooner not take the shock out if I don’t have to, but no problem I guess!

    Need to remember to take chain device into account this time too!

    Premier Icon composite
    Subscriber

    Forgive my ignorance I’m about to do this for the first time myself.

    If you are not sat on the bike when you measure the chain (so there is no sag and the shock is at it’s longest) then why would the chain be too short measured in the normal way? ie big chainring to big cassette sprocket + 1 link.

    ‘Cos when the suspension compresses the cassette moves further away from the chainring – to varying degrees depending on the suspension linkage, pivot points etc.

    composite – because with some suspension designs the rear axle gets further away from the BB as the suspension compresses so with the sus compressed you need a longer chain

    Premier Icon composite
    Subscriber

    Yes that makes total sense, thanks. 😳

    Premier Icon vinnyeh
    Subscriber

    Why would you want to remove the shock to measure? A bit excessive I’d have thought.

    Well, if it was a coil you’d have to if you wanted to be sure.

    thepodge
    Member

    Or do like I just did and buy a frame with the pivot around the bb.

    I actually have one of those, though it’s the outgoing frame not the incoming one.

    Premier Icon GavinB
    Subscriber

    Or do like I just did and buy a frame with the pivot around the bb.

    That’s bit excessive surely? The poor bloke just asked for a spot of advice on how to fit a new chain, and you’re telling him he needs a new frame!

    Singletrack innit 😀 I’d expect nothing less. Just surprised no one has recommended a singlespeed rigid 29er yet.

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