I'm thinking I might get a set of Kreitler Hot Dogs. For me, I think it would do more good to keep my form up over the winter, than my fitness. I could always ride them harder and longer, (and in a harder gear) for the fitness aspect. I don't do intervals, anyway.

Does anyone have some experience they can share using the 3.0's as opposed to the 4.5's? I'm a strong rider, but I doubt that even the 4.5s would be too easy with max gear of 53-11. Experience?