We think the Sondors Ebike is one of the best upgrade platforms ever. It has an awesome battery box with room for giant battery and a convenient way to hide the wiring mess. It has a steel frame that is strong even at high speeds. It is an awesome looking fat bike with giant 5 inch wide wheels. It has no real warranty so you don’t have to worry about voiding it. Most importantly it is affordable...in fact probably the best ebike bargain ever….but just a little slow in its stock form. We are offering parts to make it go faster.