Advertise on Bikeforums.net



User Tag List

Results 1 to 10 of 10
  1. #1
    dirtbag psycho d's Avatar
    Join Date
    Jan 2008
    Location
    SLO town
    My Bikes
    Giant full suspension, Surly LHT, something Italian soon!
    Posts
    119
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Italian BB limitations???

    Hola. At yesterday's swap meet i picked up and "Italianish" road frame and fork that i would love to build up as a flip-flop (or maybe even a fixie) to use around our hilly little town. It has Campi Horizontal dropouts with 120 mm space between, an elegent reinforced fork with a classic Dura Ace headset, and a 70 mm BB space (no BB though). My first goal is going to be coming up with a suitable drivetrain. Before i get too excited, are their any major limitations to having an Italian BB??? i read that Shimano makes an Italian threaded BB, and if that is so, then i will probably stick with a Japanese drivetrain (but since it will be a total buildup i am not totatlly married to this). BTW, i am sure to have many more dumb questions, but i promise to use the search button and to read (and reread) Sheldon's beta first. Also, any input on potential components would be highly welcome. TID.
    d

  2. #2
    Senior Member Ziemas's Avatar
    Join Date
    Nov 2004
    Location
    Riga, Latvia
    Posts
    10,060
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There are no real considerations as far as the BB goes except that some sizes and tapers might be difficult to find. FWIW both of my fixed gear bikes use Italian BBs.

  3. #3
    Newbie
    Join Date
    Feb 2008
    Location
    Toronto, canada
    Posts
    4
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    remember to keep an eye on how tight the bb is, because of the direction of the threading it will probily loosen for the first little while as you ride

  4. #4
    <3s bikes Re-Cycle's Avatar
    Join Date
    Dec 2005
    Location
    CA
    My Bikes
    lots
    Posts
    1,049
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    what ever you end us using, make SURE you tighten the drive side down. Italian BBs are not reverse threaded on the drive side and can work their way loose.
    A wild man once explained to me how bicycles came from sailboats.

  5. #5
    Packfodding 3 caloso's Avatar
    Join Date
    Jul 2002
    Location
    Sacramento, California, USA
    My Bikes
    Ridley Excalibur, Gazelle Champion Mondial, On-One Pompino, Specialized Rock Hopper
    Posts
    29,617
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Blue Loctite works for me.
    Cyclists of the world, unite! You have nothing to lube but your chains!

  6. #6
    THIS SPACE FOR RENT
    Join Date
    Jan 2006
    Posts
    2,849
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Italian BB's are less limiting than english, you can basically adjust the chainline up to about 3mm in each direction by installing it L side in or R side in and using spacers. This doesn't really make them better, they will still unscrew sometimes if not installed "backwards," but it does mean you can adjust the chainline.
    "I don't buy new frames, it just encourages them."

    -T.G.

  7. #7
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    phil wood makes italian cups for their bottom brackets. if you're going to put money into this, you might want to consider a titanium bb with alloy cups.
    as a bonus, they're micro-adjustable for a perfect chainline.
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  8. #8
    yo yo yo yo yo
    Join Date
    Nov 2005
    Location
    delaware
    Posts
    2,518
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    can someone explain the italian bottom bracket loosening thing, i have never understood it..

  9. #9
    partly metal, partly real sp00ki's Avatar
    Join Date
    Aug 2005
    Location
    Philadelphia.
    My Bikes
    Hummer H2
    Posts
    3,597
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    i don't get it either. if it was reversed (ie, drive side regular, non-drive side left threaded) british would make more sense, but the idea that an italian drive side comes unscrewed seems illogical to me, as the crank moves in the direction which tightens it. you'd think it would be the non-drive side that comes loose...
    Quote Originally Posted by bonechilling View Post
    Road [racing] is one of the only sports where adult men can compete in a non-scholastic setting, so inevitably 8/10 racers are fiercely-competitive nobodies. It's fun as hell, but it's also the foremost refuge of defeated and aging jocks, turned middle-management types.

  10. #10
    Packfodding 3 caloso's Avatar
    Join Date
    Jul 2002
    Location
    Sacramento, California, USA
    My Bikes
    Ridley Excalibur, Gazelle Champion Mondial, On-One Pompino, Specialized Rock Hopper
    Posts
    29,617
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    From Sheldon (who else?):

    Precession

    "Precession" refers to the tendency of a part subject to rotating stresses to rotate in the opposite direction of the stress rotation. In bicycle applications this becomes a particular issue with the threads that hold pedals into the crank, and the threads that hold the bottom bracket assembly into the frame. See the Pedals entry in this Glossary, and Jobst Brandt's article on Left Hand Threads on this site for a detailed explanation of precession
    Cyclists of the world, unite! You have nothing to lube but your chains!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •