FSA ORBIT X 1 1/8" THREADLESS HEADSET - Threadless headset in a classic shape with modern styling for high-end road bikes. Forged and CNC machined 6061/T6 and aluminium cups. Patented alignment tip for increased durability and performance, TH brand 36 degree micro angular contact bearings. 7075/T6 crown race and aluminium top cap. Stack Height: 18.4+13.1=31.5 For replacement upper and lower bearings order part no. 160-6475 x 2. Colour Black. Size 1 1/8". Weight 99gm