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fixie bb help

  • 24-08-2010 6:06pm
    #1
    kidclyde
    Closed Accounts Posts: 10 ✭


    i have an early 70s sun racer which is running a fixed gear
    it has a loose bb crank and crank arms are held in with cotter pins
    how could i put a modern bb in it as im putting a new crank in it


Comments

  • #2
    Gavin
    Registered Users, Registered Users 2 Posts: 4,676 ✭✭✭Gavin


    Article on removing the cranks (if you don't know already)
    http://www.sheldonbrown.com/cotters.html

    Then it depends on what type of BB you currently have to remove it
    http://sheldonbrown.com/gloss_bo-z.html#bottom

    Probably a cup and cone.

    Then find out which way your frame is threaded, english or italian, what width the shell is, and pick up a bb the correct size.


    I wussed out and brought mine to Joe Dalys, they swapped it out and put in a cartridge one for around 40 quid I think. Easy option as BB removal can be torturous if it's rusted.


  • #3
    kidclyde
    Closed Accounts Posts: 10 ✭kidclyde


    i can take it all out easy
    but i want to put a cartridge bottom bracket into it so i can put a modern crank in it
    and its an english thread

    thanks gavin


  • #4
    07Lapierre
    Registered Users, Registered Users 2 Posts: 8,310 ✭✭✭07Lapierre


    kidclyde wrote: »
    i can take it all out easy
    but i want to put a cartridge bottom bracket into it so i can put a modern crank in it
    and its an english thread

    thanks gavin

    You've just answered your own question.


  • #5
    kumate_champ07
    Closed Accounts Posts: 7,150 ✭✭✭kumate_champ07


    what width is your bottom bracket shell, 68mm?


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