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  1. #1
    mtbr member
    Join Date
    Nov 2008

    lock ring spacer required for Shimano XT cassette?

    I just installed a Shimano XT cassette (CS-M770 type AS). My question that the instructions specifically show a lock ring spacer yet the box I bought did not include a lock ring spacer. My previous cassette (XT also but 5 years older) did not include a spacer. Am I good to go or is the spacer required?

    Currently shifts reasonably well except but needs some fine tuning. I'm just too beat to work on it anymore.

  2. #2
    Trail Ninja
    Reputation: Varaxis's Avatar
    Join Date
    Mar 2010
    Lockring "spacer" = that super thin washer on the inside of the lockring? I think it can come loose, but I'm always careful to keep it sort of stuck on there, with the threads lightly holding it on.
    We're all on the same ship, and it's sinking.

  3. #3
    mtbr member
    Join Date
    Nov 2011
    I've probably installed 10 or so cassettes in the last year or 2 and I don't think a single one has come with that washer. Several of the ones I've taken off have had it. I wonder if it's an OEM thing to make it easier to install with power equipment, more accurate torque or something.

  4. #4
    mtbr member
    Join Date
    Nov 2008
    Thanks for the replies. I don't think there was a super thin washer. There definitely isn't one on my old cassette. I'm guessing they redesigned the cassette but didn't change the instructions.

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