20 Inch Kids Bicycles , Fat Tire Mountain Bike for Boys and Girls Age 5 Years ,Dual-Disc W1019P203874Steel frame high strength, reinforced more durable , comes 85% assembled shimano 7 Speed shifter and derailleur ,make gear changes easy and smooth Suspension fork soak up bumps and thumps to provide you a durable riding experience Fat tires provide better grip and traction on rough roads, keeping you safe and allowing you to drive smoothly and easily on sand, snow, gravel, rain, mud and sand for the ultimate adventure! Disc brakes on mountain bikes