E-bikes are more popular than ever and available at almost every price point. If you’re thinking about buying one, chances are you have some questions about the electric motor that propels you over hills and delivers impossible Strava bike motors. We did, too, so we researched the heck out of the growing e-bike industry to find out everything we could about the motors and the way they interact with e-bike and rider.Those brushes made the motors less efficient and tended to wear out over…