Trek have just released the latest model hardtail electric mountain bike. This is the Generation 4 model of the Powerfly. This is one of the top of the line hardtail electric bikes you can find. It’s running with the Bosch Performance CX line. A new feature that is found on this model and should be seen more commonly on ebikes running the Bosch system is an application that allows you to adjust motor settings and track your riding activity and navigate.