Strider ST-4 (TM) Toddler Pre-Bikes - Pink / One Size Quick-Clamp System for Fast, Easy, No-Tool Assembly and Handlebar/Seat Height Adjustment. Custom STRIDER Ultralight Wheels with Our No-Flat EVA Polymer Tires That Never Need Air. Sealed Cartridge Bearings - Smooth Rolling and Maintenance Free. Softer Durometer Grips - More Comfortable Feel on Toddler's Little Hands. Bright Powder Coat Finish on Frame - Longer Lasting, More Durable Paint Finish.