The only thing holding me back from SS is my speed needs. I like to ride fast down hills and on flats. And on my local climbs, I could not climb to the top in a 2:1 ratio. For those of you who have converted from a 27 speed, do you notice theses differences in how you ride? Do you miss anything about having more gears? I like the simplicity of SS more than anything but I'd like to hear the pros and cons about the SS rigs. I think an SS will give me more fun without hastle and give me better conditioning. I don't know though.