What did you get?? I thought you loved your ti isis???? I do love my cervelo RS even more than my isis, but i think its cuz I screwed up the size when I bought my Isis and mine is too small for me.
For the original poster, I have had steel, ti and carbon. My carbon is my favorite, but it may not be just about the frame material, its about the fit and other aspects of the design, although it is also my lightest bike and light is good if you like to climb or do fast group rides. But aluminum is equally light although I personally don't have any experience with aluminum.





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