Chris King has solved the dilemma of buying a new crankset only to find out it doesn't fit your existing bottom bracket. The new ThreadFit 24mm Bottom Bracket is essentially a modular system able to fit most any crankset with the simple addition of an adapter. This bottom bracket features an external cup threaded design and pairs with one of Chris King's BB Conversion Kits to fit your crankset of choice. And this isn't any old bottom bracket. The system has ceramic bearings, which make it lighter and faster. Chris King isn't a big importer. As such, all of its products are engineered, manufactured, and assembled in Portland, Oregon.