This is my third Wallke Ebikes. I have two X3MAX'S and a H7 40ah. The Wallke H740ah is built for range. The step thru is easy to get on and off. Both models are good choices. The Wallke H7 40 single motor has a little less torque than the X3MAX'S, which is good if you not want to be pulled on the starting block. You never have to worry about your battery running out of power on 20 miles runs to the park and back. I'm very pleased after the final build. It runs as good or better than most 20 x 4 ...