by steve on Wed May 06, 2009 7:29 am
Since you already have the compact setup (34 x 50) I'd stay with it unless you don't mind spending the extra dollars.
Having ridden with you on several occassions on climbing routes, I'd recommed going with the 12-27 cassette. You're a masher more than a spinner; I think that 28 gear will be too "light" for you - and it creates a huge spread in ratio between the taller cogs making it more likely that you'll have difficulty finding the right cog to be in (on a steep climb, one cog might feel too heavy while the next too light - it can destroy your rhythm).
Notwithstanding what I've just said, if you're feeling "bonky" on the back of Ebbetts or on the windy ascent of Carson Pass, that 28 cog could be a life-saver. You'll be going real slow, but you'll still be going.