Talon Groovelite Rear Sprocket - 52T , Material: Aluminum, Color: Orange, Sprocket Teeth: 52, Sprocket Size: 520, Sprocket Position: Rear 75-13052O Talon Groovelite rear sprockets feature a self-cleaning groove to remove debris when riding in even the toughest conditions. All Groovelite sprockets are machined from high-grade aluminum alloy, making them some of the strongest and lightest sprockets on the market.