Chris king dropset 2 headset is42 is52an integrated headset made with top quality materials and a versatile design, this chris king model ensures a smooth rotational interface between your fork and head tube. Consisting of a 42mm upper bearing and 52mm lower part, it holds firmly to your fork thanks to its patented griplock construction, allowing you to twist and turn with confidence and composure as your route dictates. Suitable for use with chris king baseplates and 45 degree integrated crown races, this hard wearing headset is a great match for a variety of frames.features upper bearing 42mm 45x45 lower bearing 52mm 45x45 design patented griplock construction compatibility open, 3t, all city, low, cinelli, lynsky frames and more buy chris king components from chain reaction cycles, the world's largest online bike store.