Origin8 Alloy Ramped Chainrings, Black/Silver Review Posted by GiantPandaisy May 26, 2018 in Drivetrain Components 6061-T6 alloy replacement rings 8, 9 and 10-speed compatible Black anodized with silver CNC machined teeth Ramped and pinned Made in U.S.A. Origin8 Alloy Ramped Chainrings in different size variations Cycling Origin8 Outdoor Recreation Parts & Components Sports & Outdoors