Renthal Grooved Front Sprocket Ducati Desmo 450 MX / EDX Renthal grooved off road front chainwheels are designed to offer excellent durability with a lightweight design which delivers maximum power transfer. Each sprocket is CNC machined from cased hardened and core refined 655M13 nickel chromium steel. Mud grooves are then CNC machined into each tooth on both sides to allow mud to flow away from the key contact points between the chain and the sprocket. This unique design helps reduce wear and dramatically increases the lifespan of your drivetrain. Features: Precision CNC machined to extremely tight tolerances for maximum performance Self-cleaning mud grooves between every tooth on both sides help prevent dirt build up Case hardened and core refined 655M13 Nickel-Chrome-Molybdenum alloy steel construction to give the ultimate combination of strength and hardness Note: Images are for reference only, actual sprocket will vary based on make and model.