I know there are a lot of variables, but how far can you go on a charge? Lot of cyclists talk about riding about 30 miles on their e-bike, but I regularly ride 50 plus miles, and about a dozen metric centuries a year. (Sometimes these rides are fairly hilly, and my riding partners usually leave me when we hit the hilly sections; hence my interest in an e-bike.) Is it realistic to do this on an e-bike? What should I look for be able to ride a metric? (I am considering a Trek CrossFit+)