Originally Posted by
Sojodave
I've done the metric centuries in Keto. Make sure your in Ketosis for long rides. You can either eat very little or continually. I rode 75 miles with a 17.6 mph average. I ate 2 kind bars, 1 quest bar, and some almonds.
I don't think this sort of thing is hard to achieve for any fit cyclist that does a reasonable amount of training.
I am not into Keto diets etc but have no problem riding a metric century on just water. I wouldn't be able to push hard for long but if the pace is kept moderate it isn't a problem.