Originally Posted by
badhat
the nice thing about going that way is you can swap cassettes and have a less severe every day gearing but with just the sway to a cassette with a 34 youre all set for steeper stuff with no weight penalty or mechanical clunkiness from a triple.
Just to be clear, you can't put a 34 cog on the medium cage Apex (standard on the Roubaix Elite), which has a max range of 32. You'd have to go to a long cage which can handle up to a 36 cog.
You can get the short cage (28 max) and medium cage (32 max) on Rival as well. My new bike that is on its way to me now has the medium-cage Rival derailleur for use with an 11-32 cassette, I'm very much looking forward to spinning up some hills on it.