FSA Orbit MX 1 1/8 Threadless Headset GreenFSA Orbit MX 1 1/8 Threadless Headset. FSA's quintessential threadless headset retains it's title of undisputed champ in the world of headset quality. Using 36 degree ACB instead of machine-shop style non-angular bearings allows the Orbit to take the hits without sacrificing smoothness, weight or durability. 95 grams, Includes top cap, star nut and bolt.400310039279
