Advertise on Bikeforums.net



User Tag List

Results 1 to 5 of 5
  1. #1
    Junior Member in difficulty's Avatar
    Join Date
    May 2007
    Location
    Modesto
    My Bikes
    1986 Specialized Stump Jumper.
    Posts
    18
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Bottom bracket and their square pegs.

    Hello to all,
    I will say again, excuse my ignorance as I am new to road bikes and their parts. Now, bottom brackets, they all seem to have the same square shaped thinga-ma-jiggy sticking out that the crank fits on to. Are they all the same size? Will any crank assembly fit on all bottom brackets? I have my eye on a sweet Vintage Raleigh frame and was wondering if I should buy a Campagnolo triple set up that I saw on ebay before I ever see the frame. What is the normal process for buying used parts to put on old bike frames? Thanks

  2. #2
    ಠ_ಠ DevilsGT2's Avatar
    Join Date
    Sep 2006
    Location
    SF
    My Bikes
    One of the first Aluminum Rockhoppers to come with front suspension.
    Posts
    624
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    If the hole is square, and the thinga-ma-jiggy is also square, they will fit just fine.
    Singletrack Mind

  3. #3
    Senior Member FlatFender's Avatar
    Join Date
    Aug 2006
    Location
    Raleigh NC
    Posts
    989
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DevilsGT2
    If the hole is square, and the thinga-ma-jiggy is also square, they will fit just fine.
    wrong.

    there are 2 sizes. ISO, and JIS

    http://www.sheldonbrown.com/bbtaper.html

  4. #4
    I ain't no newbie redirekib's Avatar
    Join Date
    May 2007
    Location
    The Goddard Institute - Area 51-Skunk Works Division - Space Age Materials Lab
    Posts
    1,183
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by DevilsGT2
    If the hole is square, and the thinga-ma-jiggy is also square, they will fit just fine.
    Also can't forget about length.

  5. #5
    * vpiuva's Avatar
    Join Date
    Jan 2007
    Posts
    3,458
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    My money's on the old Raleigh's BB spindle length not matching what you'll need for the Campy triple, but your swap should be easy. How old and what model frame? Raleigh did have some with proprietary threading, you'll want to avoid those.

Posting Permissions

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