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  1. #1
    Junior Member
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    Cinelli Proxima BB Size Identification

    I have acquired a Cinelli Proxima (2002) frameset, which i plan to build up over the next few months. I've decided on Campagnolo components over Shimano.

    One of my first components to buy, is the bottom bracket, but i am unable to confirm whether this frameset is English or Italian BB threading.( I can only assume that being a Cinelli frame, that i will need an Italian thread.)

    Any help on how to identify the threading of the BB shell would be a great help.

  2. #2
    Senior Member
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    Hello!

    Italian BB shells are 70 mm wide
    English ones are 68 mm wide
    This difference is really small, but really important.
    The best way may be to go to a LBS and borrow an Italian
    cup and see if it threads into the shell. The threading is the same
    as the English threading I think-24 tpi, but the Italian diameter
    of the shell opening is marginally larger than the English shell. English cups have 1.37 x 24 on the cup, and Italian have 36 x 24. Italian
    cups will not thread-art too large to thread into an English BB shell. English cups will
    not catch the threads of an Italian shell.
    Italian BB's have a right-hand thread on the drive side,
    (tighten clockwise)
    English BB's have a left-hand thread on the drive side,
    (tighten counterclockwise)

  3. #3
    Banned
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    Quick way to find out: look at the threads inside the BB shell. If they are the same direction all the way through, then it's Italian. If they change direction from one side to the other, it's English.
    Je vais à vélo, donc je suis!

  4. #4
    Senior Member pat5319's Avatar
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    Seven Axiom Ti, Trek 620, Klein Aura x, Masi cylocross (steel). Masi Souleville 8spd, Fat Chance Mtn (steel), Electra Amsterdam (Steel), Bianchi (Japanese) set up as "fixie", Scwinn Triple Bar cruiser,
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    If it's actually made in Italy- it's 99.999% sure to be Italian.

    ( and the above threads are correct- even D* Alex!! )


    Ride Italia- Belleissimo ( or sumpin)
    Pat
    Pat5319


  5. #5
    Senior Member
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    Originally posted by pat5319
    If it's actually made in Italy- it's 99.999% sure to be Italian.

    ( and the above threads are correct- even D* Alex!! )


    Ride Italia- Belleissimo ( or sumpin)
    Pat
    Nasty generalization.Current issue Bianchis aren't.

  6. #6
    Senior Member pat5319's Avatar
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    Seven Axiom Ti, Trek 620, Klein Aura x, Masi cylocross (steel). Masi Souleville 8spd, Fat Chance Mtn (steel), Electra Amsterdam (Steel), Bianchi (Japanese) set up as "fixie", Scwinn Triple Bar cruiser,
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    My apologies
    Pat
    Pat5319


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