The bike reaches a top speed of20 mph (32 km/h) in throttle mode and28 mph (45 km/h) in pedal-assist mode. Engwe L20 2.0 Electric Bike. The 20 3.0 fat tires with granular pattern grip the ground more powerfully and anti-skid, and the 180mm armored disc brake disc, the brakes are more sensitive and stable, which enhances the comfort of your ride.