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Can the exact same saddle go from extremely comfortable to "there's no room for my ass in the back" by moving on to a bigger bike? Both were city bikes but now it's 650, I'm sitting mostly upright, but for some reason now it feels I'm going to fall backwards. The saddle is pushed all the way back, and tilted very slightly up. Also related to that: modern seatpost clamps are more accurate angle wise? The classic clamp with all the pieces to put together allows, spirit level in hand, either "slightly up" or "slightly down" as most accurate. You can't land it in dead center.
