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  • Chain length issue if I upgrade to a bigger chainring?
  • Darra8
    Free Member

    Hi,

    Quick question.

    Just got a new 1×12 SRAM NX hardtail and I would like to upgrade the chainring from 30t to either 32 or 34t. Could I get away with keeping the existing chain?

    Posted 4 years ago
    tjaard
    Full Member

    Only way to tell is try it out. Many (stock) builds have an overly long chain. Put the new chainring on and if the chain is too short, install a longer chain.

    Posted 4 years ago
    cynic-al
    Free Member

    You may be able to work out how much surplus you have when in bottom gear

    Posted 4 years ago
    tjagain
    Full Member

    IIRC 2 extra teeth on the chainring does not mean two extra links needed?

    Posted 4 years ago
    stevextc
    Free Member

    You deffo need to suck it and see.
    If its currently near the max and you go 34 you can add an extra single link and second split link..

    Posted 4 years ago
    cynic-al
    Free Member

    Yes TJ, only half the chainring is engaged with the chain.

    Posted 4 years ago
    n0b0dy0ftheg0at
    Free Member

    See what http://www.machinehead-software.co.uk/bike/chain_length/chainlengthcalc.html says, a 2T increase might be absolute fine.

    Posted 4 years ago
    Darra8
    Free Member

    Thanks very much for the replies

    Posted 4 years ago
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