Joined: Dec 2004
Posts: 12,551
Likes: 798
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Catrike Speed
My experience jibes with cato's. Compared to a flat route, climbing 100 feet/mile including some steep grinders will lower my average by 4 mph or so.