Royalbaby Button Kids' Bike with Training Wheels Perfect Gift for Kids. 16 Inch Wheels, Black Frame/Fork: Pulse TIG welded steel 12mm frame and BMX TIG welded steel fork with leading edge dropouts Wheels/Tires: Steel 20 hole rims, rubber knobby tires, 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, Kraton soft rubber grips and special juvenile saddle and quick release seat post clamp Extras: Bell, assembly tools, designer frame pad and HEAVY DUTY training wheels