Ok, that makes sense. When I calculated what I ingested over the whole ride it was only 47 g carbs/hour, but the drink mixture was 100 g/liter, and I guess that will still mess with the osmosis of the stomach. I think before I throw the (fairly expensive) bag of Tailwind out after one use, I’ll try again but with lower concentration. The next bi one is in three weeks, but I can try it in training sessions before that.