On my first SS ride which was a 1600km, I ate at the McDonalds at half way and the return ride was a nightmare. I stopped at many gas stations to relieve myself but nothing worked. I had to ride with a belly ache until that ache disappeared. My second and third SS were a 2000km that I simply ate my rice Krispies from Costco. It was 18.5 hours for my first, 21.5 for my second and 22 hours for my third ride. The worst part of the ride is going, coming back is just too good.