The challenger is mountain ebike with equipped with a torque sensor and 500W gear hub motor.
With 48V battery, the Challenger can reach 40 - 70 miles and top speed of 25 MPH.
With removable battery,you can charge the ebike more conveniently.
Torque sensor not only helps to provide a excellent riding experience but also helps to detect and adapt to different situations such as riding uphill or riding fast on a flat straight.