Schwinn Twister Boy's Bicycle, 20" Wheels, Multiple Colors Schwinn smart start geometry creates the perfect fit and provides more control and stability for young riders Seat and grips are designed smaller to fit a child's proportions and tool-free adjustable seat post for easy height adjustments on the go Narrow pedal width is sized to fit a child's hips Kid-specific saddle and relaxed seat tube angle allow proper leg extension for easier pedaling Front and rear caliper brakes for strong, intuitive stopping; rear coaster brake for added safety Top tube and handlebar pads add style and safety