Top speed is not really a function of weight unless you're riding a tank; that's more important in acceleration and climbing. With a 52/11 ratio - 5 gear-inches bigger than any in the list above - my '04 Jamis Coda would probably be as fast as any hybrid on the road; that ratio is good for 37.5mph @ 100rpm's. If I could pull it, which I have a couple of times, wind-aided in an all-out sprint. To emphasize the ridiculousness of that gearing, the current Codas only use 48t big rings. 50/12 is the current norm.