Swapped out rear mech and now chain too long?

chrisivens
chrisivens Posts: 10
edited June 2013 in MTB workshop & tech
Strangely, changing to an SLX rear mech from a Deore and now I have way too much chain slack. I thought they would be compatible. Very confused. Any advice?

Comments

  • owenlars
    owenlars Posts: 719
    Shorten the chain
  • The Rookie
    The Rookie Posts: 27,812
    Er no.....first is the chain the right size - if it is shortening it is a really bad idea! - secondly have you changed to a shorter mech without enough capacity, thirdly is the spring fubarred?
    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.
  • chrisivens
    chrisivens Posts: 10
    Looks like the chain was simply too long. Took it off and measured it against the original and hey presto, 6 links too much. All sorted now. Shifts like a dream.

    Can't believe the Deore didn't moan about it. Maybe it did and gravity was helping it. The spring was weak and the chain slap was unbearable so gravity might have been on its side.

    Cheers for the tips.
  • The Rookie
    The Rookie Posts: 27,812
    Why not now measure it properly (big/big missing out rear mech and add one pair of links) as it may still be the wrong size.
    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.

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