XB-300-SLA X-Treme Electric Mountain Bicycle (Silver) Kenda Tires, Brakes front and rear, 24 Volt Lead Acid Batteries 7 Speed Shimano Tourney&amp;reg; Gears &amp;amp; Shifter Electric Mountain Bike, 300 Watt Rear Hub Motor 20 MPH Up To 20 Miles Per Charge, Front Shocks 26&amp;quot; Wheels, Power Assist System