In development for over 5 years, the new Renthal TwinRing sprocket will re-define the term durability in off-road drivetrain products.The longest lasting most durable off-road sprocket you can buy.The goal when developing this product was simple, create a In development for over 5 years, the new Renthal TwinRing sprocket will re-define the term durability in off-road drivetrain products.The longest lasting most durable off-road sprocket you can buy.The goal when developing this product was simple, create a