I should clarify my eating strategy. If the ride only lasts an hour to an hour and a half, I may eat little to nothing during the ride, assuming that I ate sufficiently before the ride. For longer rides, I start eating at about the 15-mile mark and continue from there. The longer the ride, the shorter the intervals between bites of food. I can usually last between SAG stops, but I keep food on my bike just in case. For really long rides, I typically keep a bag of food in my top tube back, so that I can grab it really easily.