BK10M This electric bike is equipped with a powerful and stable 750-watt motor. It has a top speed of approximately 20 mph. Specially equipped with 20*4.0 fat tires, the BK10M e-bike has a built-in 48V 12Ah removable lithium battery. The handlebars on this adult e-bike can be adjusted to fit your needs. The unique foldable design makes it easier to put into the trunk, convenient to carry and store, perfect for outdoor activities and short trips.