Royalbaby Space No. 1 Aluminum Kid's Bike, 12-14-16-18 inch Wheels, Three Colors Available Frame/Fork: Hydroformed Aluminum frame and BMX TIG welded steel fork with leading edge dropouts Wheels/Tires: Steel 20 hole rims with rubber wide 2.4 inch knobby tires with custom Royal Baby tread Drivetrain: Enclosed chain guard, non-slip resin pedal with reflector and one piece crank Brakes/Cockpit: Front caliper brake and rear coaster brake and special kids size brake lever, Kraton soft rubber grips and special juvenile saddle and quick release seat post clamp Extras: Water bottle and cage, bell, assembly tools, and HEAVY DUTY training wheels