Our Rock rider ST100 is perfect for new riders! It is a sturdy, single-speed, controlled braking, 20" white bike that's simple to ride. Its total weight is only 24.3 lbs. Equipped with front and rear lights and a bell; it can be ridden around town as well as on trails. The chain wheel anti-derailment device and low step-through frame make it easy to get on and off. Fully equipped for use on public roads (bell, reflectors). The Rock rider ST100 derailleur's guard protects the derailleur from damage in the event of an impact.