The Piranha 20" Heartbreaker 7-Speed Bike offers a great ride for younger riders. The Piranha Heartbreaker kids' bike features a mountain bike saddle for a comfortable ride and V-brakes for confident stopping on a variety of different surfaces. With the quick-release seat post, the Piranha kids' bike is easy to adjust for a better fit. For easy and quick shifting, this kids' bike features MICROSHIFT grip shifters.