The Shadow Conspiracy Cranium sprocket is a super cool inexpensive sprocket for your bike. Click HERE for available colors and sizes and to order yours now. Stronger and stiffer 7075 alloy is super light and extra strong. 5mm thick 7075-T6 alloy. 15/16″ bore (24mm compatible). Includes 19mm & 22mm adaptors. 1/8″ flat design teeth. Weight: 3.6 oz. These are going quick! Only a couple left in stock so don’t slip on these!