UNLESS YOU JUST BIKED the Tour de France, few cycling experiences inflate an ego like watching a bike’s odometer hit triple digits on the same day it registered zero. And cycling into shape for those 100 miles takes less time than you think. Try two months.
Well, there is plenty of information on improving endurance (VO2 max) but this one looks more reasonable than some I’ve seen. It doesn’t assume you don’t have anything else to do but train, for one thing š