Advertise on Bikeforums.net



User Tag List

Results 1 to 5 of 5
  1. #1
    Senior Member Dominae's Avatar
    Join Date
    Jun 2006
    Location
    Woodbridge VA
    My Bikes
    Cannondale Super Six; VD Gin & Trombones
    Posts
    164
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    Change to compact crank

    I currently have a standard Ultegra cranset (6600) and the bike has the corresponding Ultegra bottom bracket. I want to switch to an Ultegra compact crankset (6650), but it is unclear if I would need a new bottom bracket to accomodate a compact crankset. Does anyone know whether a new bottom bracket would be required?

  2. #2
    Your Recovery Ride Buddy krazygl00's Avatar
    Join Date
    Jan 2010
    Location
    24 879.6396 miles behind you
    My Bikes
    2000 Serotta Classique, 1999 Serotta C3S Atlanta, 2004 Kona Jake the Snake, 2009 Kona Paddywagon, 2006 Kona Kula, 1980's Fuji Pursuit TT Fix/SS conversion, 1980's Torpado Super Strada, Bridgestone RB1 Synergy
    Posts
    436
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Both are hollowtech, correct? Should not require a BB change.

  3. #3
    Senior Member Dominae's Avatar
    Join Date
    Jun 2006
    Location
    Woodbridge VA
    My Bikes
    Cannondale Super Six; VD Gin & Trombones
    Posts
    164
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Yes, both are Hollowtech.

  4. #4
    Senile member
    Join Date
    Mar 2009
    Location
    Boyds, MD
    My Bikes
    Felt F2C
    Posts
    179
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Dominae View Post
    Yes, both are Hollowtech.
    you will have to shorten your chain and seriously move the front derailleur. I did this and learned all about adjusting front DA derailleur in the process.
    - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
    Trying hard not to be a poser

  5. #5
    Senior Member MudPie's Avatar
    Join Date
    May 2004
    Location
    Southern California
    Posts
    1,874
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    The bottom bracket (actually two outboard bearings) is the same for the 6600 and 6650. However, depending on the age/condition of the current BB, you might want to get a new bearing set. I just bought a Shimano 6600 outboard bearing set for $15 from:
    http://www.competitivecyclist.com/ro...264.314.0.html

Posting Permissions

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