Electric Bike for Adults 26 E-Bikes 350W Adult Electric Bicycle, 19.8MPH Electric Mountain Bike with Lockable Suspension Fork, Removable Battery, Shimano 21-Speed Gears. 350W HIGH-SPEED MOTOR : 26 electric bike for adults is equipped with a brushless powerful HIGH-SPEED MOTOR, which provides enough power, max speed is up to 20mph.