Learned something yesterday.. long duration is TOTALLY different to fast/short
I usually ride 6-7 hour 160km with very few stops. Yesterday I decided to take it up a notch and shoot for 240km. The wind also decided to step it up and push us backward for 170km of said ride. For a six hour ride fast pace and quick snacks do fine. Hit hour 10 though and that pace has sapped your energy and not eating enough is bad. Next time I drop the pace a little and pack some more food.
Did all right with 9 1/2 hours for 208km riding time and a total time of 10 1/2 hours with the wind from hell to fight, but I think better strategies are in order to circumnavigate the island I wish to beat. Thats going to a 270km ride. Would NOT have finished that yesterday.