18" Next Surge Boys' BMX Bike, Black/Green: Frame: steel BMX frame Gearing (# of speeds): single speed Brakes: front caliper and rear coaster brakes Wheels: 18" wheels and training wheels Tires: 18" knobby tires Rims: 18" rims Handlebars: handlebar pad and shield Seat: quick-release seat adjustment Pedals: resin pedals Weight limit: 89 lbs Assembly required Dimensions: 48.5"L x 25.5"W x 36"H