I did some real miles(50 miles only) and felt gassed out. I think it was the sun, I'm not really use to warm weather and I really don't like cycling when it's in the mid to high 80s. By mile 35 I felt spent and was already struggling, though I think I was getting head wind at the last stretch. Bike wasn't loaded or anything, and this was pretty much on flat paved surface. Took me over 4 hours just to do 50 miles. I'm not ready for touring it would seem. I felt fine the next day though, no sore muscles or anything like that. Starting to think it's just the heat and recent weather change that my body has to adapt to. And deciding to just eat oatmeal for breakfast was probably a bad decision too. I may of bonked. Not sure. But going 12mph at the last stretch was pretty silly.