I was told that if I were to change from my road bike to a bike specialised for time trialing it could add 2 mph to my typical strait line speed. Honestly for the prices they sell, I could get one with an engine and add 100mph to my speed. Seriously how much difference does all that aeroshit make to a 20mph object? Are they fobbin me off or do they have a point even if 2 mph did make that much difference anyway?