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  1. #1
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    What part is this?

    Hi, I just finished to convert my 3 speed crank into single speed using raceface narrow wide chainring.
    But in the process, when I pull off the crank using the crank puller, there is a part that fall off and I do not know what part is it and where its come from. Its somekind of a safety ring.

    Anyone know what part is it? Where is it should be installed?

    My crank is shimano fc-m571, hollowtech, octalink.

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    Anyway, I did not install this part but my bike still working normal.
    Thank you

  2. #2
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    I believe that is from your crank puller not the crank, my puller has a circlip that looks exactly like that.

  3. #3
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    It is an external snap ring, meant to go on a shaft. Since you say your crank is Octalink that means you have a cartridge bearing bottom bracket.
    I would assume it belongs on the BB spindle to retain the cartridge bearing or spacers on the spindle.

  4. #4
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    Quote Originally Posted by lolaralph View Post
    I believe that is from your crank puller not the crank, my puller has a circlip that looks exactly like that.
    Or that :^) - it does look suspiciously clean and unused to be on a BB.

  5. #5
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    Quote Originally Posted by lolaralph View Post
    I believe that is from your crank puller not the crank, my puller has a circlip that looks exactly like that.
    aaahh..ic ic..thank you lolaralph..
    It could be.. my crank puller is new and I did not realize that part before.

    I'll try to find out where the part belong when im at home.

    THank you everyone

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