I changed my Fantom CX to a triple with a 11-34 cassette for some touring and winter riding (needed high cadence in cold weather due to knee and back issues).
IIRC, I needed to switch the rear derailleur to a long cage model. I used a deore rd. I also changed the fd to a triple and bought a new chain.
Last edited by rogerstg; 11-24-09 at 08:35 AM.
Reason: clarify