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  1. #1
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    Mavic 1.375 x 24 square Bottom Bracket conversion to what, thats just it to what

    Hi to everyone I'm new here first bike forum & first thread
    Why this forum I just google some of my thread title and got good feed back here
    I am replacing my Mavic Bottom Bracket square drive as the bearings had gone and the left crank keeps working loose
    I've been looking on ebay at second hand parts but I need some ad vive on what will fit our what would be best my bike is from the eighties with 105 equipment

    Thanks in advance

  2. #2
    cab horn
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    You just need to know the type of threading/shell width and spindle length for a replacement. Shimano square taper carts are widely available for ~ $25.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  3. #3
    slow as I ever was Ex Pres's Avatar
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    105 equipment probably came with either ~ 116 or 119mm spindle length. JIS taper. You should measure your length to be sure. Yours would be an English thread.

  4. #4
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    OK thanks so far i've sort of miss lead you all
    I have 105 brakes, rear derailer, front derailer, so i would like to fit 105 cranks & rings but without the square drive, our later type B/B with the toughest drive format that the 1.375 dia frame bore can take my old B/B is a 68mm x 116mm

    Thanks

  5. #5
    cab horn
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    Quote Originally Posted by keebo View Post
    OK thanks so far i've sort of miss lead you all
    I have 105 brakes, rear derailer, front derailer, so i would like to fit 105 cranks & rings but without the square drive, our later type B/B with the toughest drive format that the 1.375 dia frame bore can take my old B/B is a 68mm x 116mm

    Thanks
    If they're not square taper the other two 105 cranks are either octalink or external bottom bracket style. They will both fit on your english BB threaded bike.
    Mes compaingnons cui j'amoie et cui j'aim,... Me di, chanson.

  6. #6
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    Quote Originally Posted by operator View Post
    If they're not square taper the other two 105 cranks are either octalink or external bottom bracket style. They will both fit on your english BB threaded bike.
    Thanks for this
    I bought new eventually from Ribble Cycles sora compact, sm-fc 4500 b/b, KMC chain & the spanner 65.58.
    Had trouble removing the Mavic b/b had to bore it out then the bearing cups wouldn't start had to make a left & right hand tap
    then I couldn't get the left hand tap to start square so had to re-mount and tap in my milling machine, then it all went back together like a dream, sorted the chain length mounted the bike on the turbo trainer for a test and it was good I like the b/b designe

    Thanks

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