The other day I posted about how my IRD 11-34 MTB cassette was compatible with my Ultegra compact double. Well, as with most "too good to be true" deals, there's a catch. You either need a MTB rear derailleur, or a triple front derailleur for added room. Just wanted to set the record straight ;). It's not like you just won the lottery....but you "may have won" :p.
