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CNC machined from 7075 T6 material with a hard anodising process for increased longevity, hardness, and wear resistance.","attributes":[{"label":"General Colour C","value":"Black"},{"label":"General Product Group","value":"Chain & Sprockets"},{"label":"General Product Type","value":"Sprockets & Components (Rear)"},{"label":"Variant Id","value":"279454"}],"image":"https://www.oro2u.com/media/catalog/product/s/t/stock78700_1.jpg","images":["https://www.oro2u.com/media/catalog/product/s/t/stock78700_1.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock78700_2.jpg","https://www.oro2u.com/media/catalog/product/s/t/stock78700_3.jpg"],"description":"Renthal Ultralite Rear Sprocket 520 Pitch 50 Tooth Black. Part Number SR990-50.REN.BK. Hard anodised rear chainwheel designed for road and road racing applications. 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