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Cottered Crank Replacement

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Request: How to replace a cottered crankset.

Status: We need more parts and/or tools before I can produce this tutorial. Any bike shop or company who is willing to donate parts/tools for this tutorial will receive credit. Contact me if you are interested.

4 Requests for this tutorial:

  1. Gary on October 6th, 2009 4:07 pm

    Do you plan on doing one for cottered cranks as found on vintage English 3 speeds?

  2. Carlo on October 6th, 2009 4:07 pm

    Cottered cranks removal (old style bike) It seems a quite difficult operation especially if you would like to preserve the old cotter.

  3. Hjalmar on October 6th, 2009 4:07 pm

    Where is the chapter on [old] cottered crank arms? Park Tool no longer sells their CR-2, and I’m still loathe to use a hammer. Also, where can on get replacement cotter pins for crank arms?

  4. Bobby on November 17th, 2009 3:19 pm

    It’s actually not that hard at all. I had a loose one so I bought a replacement at my Local Bike Shop. I hammered away at it with a screwdriver to knock it out. It eventually came out (I wrecked the screwdriver in the process but I think it’s only because it was loose to begin with so it wasn’t aligned right). No damage to the bike and it’s been running perfectly for months after. I also took out the other one to remove a gear and that one I was able to use the same cotter pin.

    for Hjalmar… I saw some on ebay. I was looking to get a better crankset to step up from the panasonic original… with no luck. but yeah, ebay.

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