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  1. #1
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    tasty brighton clanger!!!

    I was into cycling along the seafront last night and decided to race a friend kind of freestyle, but unfortunately the rear end of my marin palisades kicked out, i came off and somehow, unsure how this happen, broke the spindle thing which i think is the bottom bracket, i have looked up the spec and believe it may be a cartridge sealed bracket. I am hoping this is easy to fix, although believe it may need a bike fixer to rectify.
    The whole bit has loose, to say the least, need to find out more?

  2. #2
    Senior Member mechBgon's Avatar
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    Ouch!

    The axle/bearing set that the cranks rotate on is indeed the bottom bracket. To replace it, you would do like this:

    • Use an 8mm hex key to remove the bolts that hold the crank to the axle
    • Next, use a crank extractor to push the broken piece of axle out of the severed arm
    • Use the crank extractor to remove the other crankarm from the bottom bracket
    • Use a splined bottom-bracket tool to remove the bottom bracket from the frame
    • Determine the size of the bottom bracket, which will probably be marked on its shell (68 x 113 or what have you)
    • Get a replacement bottom bracket, grease the threads of the frame and the bottom bracket, and install it using the splined bottom-bracket tool
    • Rub a dab of grease into the flats of the bottom-bracket spindle, grease the 8mm-hex bolts, and install the crankarms
    • Do a test ride and see if the crank that took the hit feels bent

    You can find illustrated instructions for the bottom-bracket removal/installation at Park Tool's site here, and for the crank removal/installation here. If you'd rather have your local shop do it, it will cost you less in labor than it would cost to buy the necessary tools. Hope that helps

  3. #3
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    Many thanks mechBgon, that is a great help, cheers
    cooly

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