Advertise on

User Tag List

Results 1 to 2 of 2
  1. #1
    Senior Member captnfantastic's Avatar
    Join Date
    Jul 2008
    0 Post(s)
    0 Thread(s)

    compact to standard chainrings

    I have a 50/34. I want to get a 52/39. Can I use my existing crank and/or front derailleur? I know I will need a longer chain, I was curious as to any other changes I would need to make.

  2. #2
    Low car diet JiveTurkey's Avatar
    Join Date
    Aug 2007
    Corvallis, OR, USA
    My Bikes
    2006 Windsor Dover w/105, 2007 GT Avalanche w/XT, 1995 Trek 820 setup for touring, 201? Yeah single-speed folder, 199? Huffy tandem.
    2 Post(s)
    0 Thread(s)
    You can find 52T and 39T chainrings in 110mm BCD (compact crank vs the 130mm BCD of standard road cranks). E.g.:

    Make sure you get chainrings designed to work as a set (rather than a a single chainring). This is more important for the outer chainring as it should have little pins to help take the chain up from the inner chainring. But, you may as well get a matching set that was designed to work together.

    There aren't many compact-specific front derailleurs out there, so your current FD should work great.

    Yes, you'll need a new chain and depending on how much use the cassette has gotten, you may want to replace it along with the new chainrings and chain.
    Quote Originally Posted by slopvehicle View Post
    Not wearing a helmet makes me more aware of my surroundings. I find myself anticipating the hardness of concrete 50 or 100 feet in front of me, it's almost a zen-like connection between my face and the pavement.

Posting Permissions

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