I find that if I use Myfitnesspal.com and plug in 12-14 mph for my rides (even though I typically ride faster), that I get reasonable correlation between body weight changes and exercise. 1100 calories per hour is off the charts... I think 400-500 is a lot more realistic for most cyclists. And I don't think you can just assume that you will burn this over the course of a very long ride as you don't maintain the same intensity. I doubt touring cyclists riding ten hours per day consume 5K calories above their baseline metabolism.
- Mark