I ride a '06 Fuji Roubaix road bike and also a fixed gear. i use the fixed gear to commute/have fun and I take my road bike out for weekend rides. I could NEVER keep up with my road bike friends while on a fixed gear. It's a joke to think that you could ever beat a road biker while on a fixed. Uphill, downhill, flat, it doesn't matter. Road bikes will ALWAYS be faster. The only exception is if you had some carbon fiber track bike and you WERE ON A TRACK.