The United Rotary Sprocket is a super clean, 3-spoke design that focuses on strength. Its fuly 3D CNC machined 7075-T6 aluminium construction and 6.35mm thickness makes the Rotary Sprocket incredibly durable and strong. The 23.8mm center bore is compatible with 19mm, 22mm and 24mm spindles with the included adapters. ###section### Product Specs TYPE: Bolt On MATERIAL: Alloy WEIGHT: 70g (2.52oz)