Royalbaby Button Kids' Bike with Training Wheels Perfect Gift for Kids. 12 Inch Wheels, Black Frame/Fork: Pulse TIG welded steel 12mm frame and BMX TIG welded steel fork with leading edge dropouts Wheels/Tires: Steel 16 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, 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