I posted above, Long and slow races it works very well with some people. And if you need anything other than water on 1.5-2 hour rides you need to do some water only rides. Your body has plenty of calories for that amount of time.
Right now all the current research shows carbs are still the king for high intensity work. That may change with more research but I don't see the studies being done for another 5-10 years
Right now all the current research shows carbs are still the king for high intensity work. That may change with more research but I don't see the studies being done for another 5-10 years