Finally plucked up the nerve to ask these. I have a Genesis Flyer, I sort of treated myself to it last Christmas. I mainly commute on it, 4 undulating urban miles each way. So far I have used it in single-speed mode, on Wednesday however the LBS is fitting a fixed sprocket.........gulp! I have been really noticing where I freewheel on my daily trips and am surprised at how often I do. I have three particular areas of concern. The first is a roundabout where I often have to adjust my approach speed,usually by stopping pedalling (which even I have realised is simply not an option), how do I do this manouvre fixed? Secondly, downhill, my route takes me down into and up out of a valley, not hugley steep, but long - do I simply relax my legs and allow them to be passively spun by my bike, allbeit at a huge rate, or do I pedal against the brakes? Thirdly, significant corners of which there are a few, normally I just freewheel, but not sure how to cope fixed? Help! I am actually getting quite nervous, beginning to think death is a real possibility!