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Bottom Bracket Repair.

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  • 20-01-2011 9:53pm
    #1
    Torque
    Registered Users Posts: 84 ✭✭


    Hey guys, Im fairly new to any bike maintenance, but anyway I've gotten a frame from my rowing coach, but its bottom bracket is in bits, cranks and gears are all in perfect nick, but I was wondering what I need to change the bottom bracket, or any idea on how much it would cost to repair professionally? Bear in mind I'm a poor student.


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    #2
    seamus
    Registered Users Posts: 68,317 ✭✭✭✭seamus


    Do you know what type of BB it is or can you post a pic?


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    #3
    Paul Kiernan
    Registered Users Posts: 2,161 ✭✭✭Paul Kiernan


    There's a fair bit in this thread about it - http://www.boards.ie/vbulletin/showthread.php?t=2056128922

    ChainReaction are doing bottom brackets from about a fiver but you will need special tools, can buy individual tools from a fiver or so or complete bike tool kit from about €40.


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    #4
    happytramp
    Registered Users Posts: 2,599 ✭✭✭happytramp


    Tools needed depends on the bottom bracket. But you will certainly need two tools, one for taking the crank/chainset off. (Probably like the one below)

    http://www.chainreactioncycles.com/Models.aspx?ModelID=10181

    And one for removing the bottom bracket. This depends on the type of bracket but probably 5-10 euro's, replacement Bottom bracket probably costs between 7-12 euro, for a cheap one from chainreaction cycles.

    It's not that tricky and you can do the job for under 30 euros total. Post a picture of your bike/crank set up, or find a similar picture online and post it. Someone will show you the right tools and methods.


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    #5
    Torque
    Registered Users Posts: 84 ✭✭Torque


    seamus wrote: »
    Do you know what type of BB it is or can you post a pic?

    Could have a pics up tomorrow evening.


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    #6
    Peetrik
    Registered Users Posts: 1,674 ✭✭✭Peetrik


    If your in dublin you could go to rothar and install the new bb yourself. Only costs a fiver an hour to use the tools


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    #7
    Torque
    Registered Users Posts: 84 ✭✭Torque


    Sorry for taking so long with these pics, haven't been near the bike in over a week and took a few rushed pics today, sorry if they're too blurry can get better quality up before weekend if needs be.

    http://twitpic.com/3v971b
    http://twitpic.com/3v965l
    http://twitpic.com/3v965l

    I'm fairly sure they're the only 3 useful pics i got for today. Hope people can help me out with this. Thanks


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    #8
    Paul Kiernan
    Registered Users Posts: 2,161 ✭✭✭Paul Kiernan


    It looks like a standard square taper. This would probably do the job - http://www.chainreactioncycles.com/Models.aspx?ModelID=22376 but you need to know what size it is. You need to try and measure the full BB spindle length i.e. it's longest external measurement.


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    #9
    tomasrojo
    Registered Users Posts: 11,746 ✭✭✭✭tomasrojo


    It's an adjustable bottom bracket. Some tips here.

    http://www.sheldonbrown.com/tooltips/bbcups.html

    You can get the adjustable side off (the side you've pictured) with a hammer and chisel to get the lockring off and then a medium-size spanner to get the adjustable cup off.

    The fixed cup will require a special tool, or something like this:
    bbtool-bolt.jpg
    (Description of how to make it in the sheldonbrown.com link above)


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