Originally Posted by
xanthochrome
Why would you do this rather than changing the rear derailleur and cassette? I'm not opposed, just curious.
I love triples for climbing steep stuff. You can greatly expand your low gear choices yet retain the nice small jumps of your gear cluster in back. As
jdawginsc mentioned above, on some triple conversions I've done I needed a new rear derailleur to handle the triple better and since they're easy to come by, typically opt for an old 7 or 8 speed MTB derailleur. DX/LX/XT