Joined: Dec 2004
Posts: 12,547
Likes: 797
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Catrike Speed
I guess it depends on if you're claiming 1/2 horsepower for a holeshot, or for a longer ride. Yes, numbers exceeding 1 hp are possible for a few seconds. Using my times from hour rides, I've calculated my output at about 0.4 hp. A half hp would be enough to let you nail a 4-hour century without drafting.