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Ultralight Rear Sprocket DESCRIPTION Manufacturer: Renthal MPN: 123U-520-51GYBK Title: Ultralight Rear Sprocket Size: 51T Option: Color: Black Rear Ultralight Sprockets: Manufactured to extremely tight tolerances from a special material developed to withstand the stress of Supercross, Motocross and Enduro. 7075 T6 aluminum alloy rear chainwheels are 66% lighter than steel, yet incredibly durable. Advanced tooth profile, concentricity and accuracy of fit provide maximum power transfer and long-li...

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