Rant American Bottom Bracket (Sealed)

The Rant American 19mm BB uses quality sealed bearings with press-in cups to fit old school and entry level BMX frames that use looseball BB's. This means you now have a much smoother and longer lasting drivetrain, but you must convert your threaded 19mm spindle to a flush 19mm, which may mean new cranks if your current ones are 1-piece, or 3-piece with a threaded spindle.