I have a Fuji hybrid that I bought for just tooling around the neighborhood and then got the cycling bug after visiting our fabulous bike trails here in Ohio. I increased my speed a bit by changing to smoother tires. Changing out the bars,shifters, & brakes was nearly as expensive as a new bike. Now I'm at the point where I really think my bike just won't go any faster (as a general rule). I'm lusting after a new, lighter, better fitting road bike so I can be more comfortable and GO FASTER! I'm convinced a lighter weight bike will make a difference in speed.