Tusk rear The Tusk rear aluminum sprocket with 49 teeth is engineered to deliver dependable drivetrain performance for powersports and off‑road riding. Tusk rear aluminum sprockets are made from a high-strength aircraft grade aluminum alloy. Finished in black, the sprocket offers corrosion resistance and a clean appearance. The tooth count is intended to support consistent chain engagement and stable drivetrain operation. This component serves as a maintenance replacement or upgrade option when servicing the rear wheel drive setup. A practical drivetrain part for riders and mechanics performing maintenance or replacement of rear sprockets.aluminum sprockets are made from a high-strength aircraft grade aluminum alloy.