I would love fueling tips. I eat quite a lot on the bike and fall to pieces relatively quickly if I under-fuel. It’s taken me a lot of work over the past few years to figure out what works for fuel and keeps me going. My usual target is 250 calories an hour between drink and eating, but on a century we typically stop for lunch about halfway through and I definitely feel it if we don’t. Should I just roughly plan on eating twice what it takes me to get through a century in order to get through a double? I’m afraid that the calorie deficit between what I’m burning and what I’m taking in will add up too fast over 12+ hours of riding.
I’d say training wise I’m rock solid up to about 70 miles and comfortable up to 100, but my longest ride ever was 107miles (with 7K feet of climbing) and I haven’t pushed past that distance yet. I’d like to do at least a 125, 150, and back to back centuries before attempting my first double.