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Derailleur - Chain Tensioner Query

  • 01-10-2017 9:03pm
    #1
    karlitob
    Registered Users, Registered Users 2 Posts: 2,594 ✭✭✭


    Just built my first bike - one or two small things to finish. Did it all on the cheap too so delighted with myself.

    Recycled an old derailleur (vertical dropouts) but the KMC chain link is catching - bought a wider B1 KMC chain. Put in a spacer and prised apart with a pliers but still catching.

    Any advice or just get a tensioner?


Comments

  • #2
    karlitob
    Registered Users, Registered Users 2 Posts: 2,594 ✭✭✭karlitob


    karlitob wrote: »
    Just built my first bike - one or two small things to finish. Did it all on the cheap too so delighted with myself.

    Recycled an old derailleur (vertical dropouts) but the KMC chain link is catching - bought a wider B1 KMC chain. Put in a spacer and prised apart with a pliers but still catching.

    Any advice or just get a tensioner?

    Appreciate any advice. Thanks.


  • #3
    07Lapierre
    Registered Users, Registered Users 2 Posts: 8,313 ✭✭✭07Lapierre


    Any photos of the chain and where it's catching?


  • #4
    Alek
    Registered Users, Registered Users 2 Posts: 4,520 ✭✭✭Alek


    In fairness I am not sure what is your setup exactly.

    Perhaps you could post some photos highlighting the issue?


    On the other hand, if you're trying to use a singlespeed (1/8") chain with a derailleur - it will catch, as they are designed for narrower chains. Use 3/32" chain to avoid it, if your sprockets can take it...

    Or get a proper tensioner without a cage.


  • #5
    karlitob
    Registered Users, Registered Users 2 Posts: 2,594 ✭✭✭karlitob


    Alek wrote: »
    In fairness I am not sure what is your setup exactly.

    Perhaps you could post some photos highlighting the issue?


    On the other hand, if you're trying to use a singlespeed (1/8") chain with a derailleur - it will catch, as they are designed for narrower chains. Use 3/32" chain to avoid it, if your sprockets can take it...

    Or get a proper tensioner without a cage.

    Understood. Tensioner without cage probably beat option. Any recommendations?


  • #6
    Type 17
    Registered Users, Registered Users 2 Posts: 2,731 ✭✭✭Type 17


    If it's only the closing link that is catching the derailleur, just get rid of it - if you don't have a chain-pin tool, get your LBS to do it for a few €.

    If you go for a tensioner, they're mostly designed to work with ⅛" chain, so it shouldn't matter whether is has a cage or not.


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