20" Mongoose Mode 540 Boys" Freestyle Bike: * Frame: steel bicycle frame * Gearing (# of speeds): single speed * Crank: 3-piece tubular crank * Brakes: aluminum brake set; rear brake only * Wheels/tires: 20" wheels * Hub: light aluminum 9T cassette hub * Axle: 3/8" axle stands up to aggressive riding * Handlebars: steel handlebars * Seat: ultra-light unified saddle and post combo * Pedals: standard pedals * Assembly required * Dimensions: 51"L x 16.5"W x 35"H