For Boyd Hilder's signature sprocket Odyssey created a clean, five spoke directional design with a fang inspired dome shape profile. Built from fully CNC machined lightweight 7075-T6 aluminium with a spoke design that increases in thickness towards the center for added strength. The Boyd Sprocket can be run on 19mm, 22mm and 24mm crank spindles with the adapters included. ###section### Product Specs TYPE: Bolt On MATERIAL: Aluminium WEIGHT: 190.5g (6.72oz) Colour: Anodized Silver, Coffee, Black; Size: 30T, 28T, 25T