Originally Posted by plpete

True. Personally, I'd find it pretty uncomfortable having that on my back. It would probably feel pretty hot too over such long ride since your skin wont be able to breath properly. If the century has checkpoints or pit stops where you can stop quickly to refill your bottles I would think that 2 large bottles should do, along with some gels and bars. Maybe a banana as well. It really may depend a lot on the weather conditions but taking a sip of a drink every 20 or so minutes is recommended. You want to stay hydrated. Also having a small snack as you ride will help a lot. You don't want to wait till you feel hunger. At that point it may be to late and you will "hit the wall".