Chris king dropset 3 headset is41 is52constructed using top quality materials, this versatile chris king headset ensures your fork rotates with smoothness and swiftness when connected to your head tube. Comprising of a 41mm upper bearing and 52mm lower part, it keeps a firm grip to your fork thanks to its patented griplock construction, letting you twist and turn as efficiently as can be. Compatible with santa cruz stigmata frames among others, this durable and dependable headset is a great choice to keep your steering column spinning.features upper bearing 41mm 45x45 lower bearing 52mm 36x45 design patented griplock construction compatibility  santa cruz stigmata frame without baseplate, and more buy chris king components from chain reaction cycles, the world's largest online bike store.