I read somewhere that the sizing on the e-bikes runs a little small, IE, someone who normally rides a medium would fit a large. Is there any truth to that?
That is fine as a generalization, but you should check the standover height and measure your inseam. My bike is a Small frame, 49cm, and I am only 5'7. I can't stand over the bike without the top tube being all up in my space if you know what I mean. I really wanted the bike so I just got the small and hoped for the best