Advertise on Bikeforums.net



User Tag List

Results 1 to 6 of 6
  1. #1
    Too many hobbies! steve-d's Avatar
    Join Date
    Oct 2008
    Location
    Hanover, PA
    My Bikes
    Maserati MT-2 (reviewed in Road and Track, 1974; Raleigh Competion GS Carlton; Dawes Super Gallexy; Hollands; Raleigh Professional
    Posts
    267
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Campy bb new vs old: are tapers the same?

    Wanted to know if I can use an older bb w/a newer crankset.

    S

  2. #2
    Old fart JohnDThompson's Avatar
    Join Date
    Nov 2004
    Location
    Appleton WI
    My Bikes
    Several, mostly not name brands.
    Posts
    12,342
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    The tapers ought to be the same, but the offset has changed several times over the years.

  3. #3
    Stop reading my posts! unworthy1's Avatar
    Join Date
    Sep 2004
    Posts
    8,193
    Mentioned
    5 Post(s)
    Tagged
    0 Thread(s)
    Phil Wood tells us that the "taper" was changed post '93...but I think it was size of spindle ends rather than taper degree, since 2 seems standard regardless of ISO, JIS, or Campy. Phil also muddles what they call the different standards as they long had a "splits-the-difference" size that was sort of universal, at least until Campy did whatever in '93.

  4. #4
    Senior Member cyclotoine's Avatar
    Join Date
    Jul 2004
    Location
    YT
    Posts
    7,553
    Mentioned
    3 Post(s)
    Tagged
    0 Thread(s)
    Yeah a new campy square taper is considered JIS now.
    1 Super Record bike, 1 Nuovo Record bike, 1 Pista, 1 Road, 1 Cyclocross/Allrounder, 1 MTB, 1 Touring, 1 Fixed gear

  5. #5
    Too many hobbies! steve-d's Avatar
    Join Date
    Oct 2008
    Location
    Hanover, PA
    My Bikes
    Maserati MT-2 (reviewed in Road and Track, 1974; Raleigh Competion GS Carlton; Dawes Super Gallexy; Hollands; Raleigh Professional
    Posts
    267
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Now color me confused. I thought JIS was different vs Campy (IS0)?

    I have a newer Campy crankset hung onto this older bb spindle. It immediately showed a slight eccentric travel.

    I'd like to eliminate the possiblilites.

    This is just presenting further possibilites.

    Steve
    Last edited by steve-d; 01-26-09 at 07:19 PM.

  6. #6
    Senior Member Grand Bois's Avatar
    Join Date
    Mar 2005
    Location
    Pinole, CA, USA
    Posts
    15,086
    Mentioned
    4 Post(s)
    Tagged
    0 Thread(s)
    Both ISO and JIS tapers are two degrees. JIS spindles are bigger at the small end. Using the wrong one won't cause "eccentric travel".

Posting Permissions

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