New cassette - Will i need new chain?

SCBronsonCC
SCBronsonCC Posts: 42
edited February 2017 in MTB workshop & tech
I have a near new 11-40 set up on my bike and tomorrow will be fitting an 11-46 XT cassette, same 11 speed groupset just bigger cassette.

Will I need a new chain or to atleast fit some links to the current one?


Thanks

Comments

  • cooldad
    cooldad Posts: 32,599
    Yes.
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  • The Rookie
    The Rookie Posts: 27,812
    You should expect to add two pairs of links (maybe 1) if it was sized correctly before.

    46-40 is 6 teeth, the wrap is about 180 degrees so that's 3 teeth, so if the chain was just big enough before 2 pairs of links, if it had over a link overlap before adding a pair of links then it may be OK on one pair.
    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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