I have a pretty iron gut...I haven't done any rides long enough to have to eat more than a piece of string cheese, crackers, and some sport beans. I will be interested to see what my first century ride does to me. I do know that my gut is not nearly as tolerate to most solids prior or during a run. First time I tried to eat a Clif bar mid-run I could barely choke down half of it and felt sick for about the next 5 miles.