Driven Racing Steel Front Sprocket - 15T, Sprocket Position: Front, Sprocket Size: 520, Sprocket Teeth: 15, Color: Black, Material: Steel 1040-520-15T One of the lightest 520 steel sprockets available today Designed using our proprietary EST Technology Performance and longevity all in one sprocket Attractive black zinc semi-gloss finish Lowered surface to remove unnecessary weight