just another gosling
Join Date: Feb 2007
Location: Everett, WA
Bikes: CoMo Speedster 2003, Trek 5200, CAAD 9, Fred 2004
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It depends on what one is doing: how hard, how long. For instance, the winner of last year's Furnace Creek 508, over a period of 24 hours drank 19 bottles of Ensure, plus ate and drank a bunch of other stuff, including obviously water. For a two hour ride, it's usually not necessary to use anything except water, if that. I ride with a fellow who drinks 1/2 bottle of plain water on a hard 60 mile ride, while I'll go through 750 cal. of gump in one bottle, plus another couple bottles of plain water. Touring, plain water works fine for me. IOW YMMV.
But to answer your title question: #1, you want to finish the ride without bonking. Beyond that, don't expect too much.