Origin8 Alloy Non-Ramped Chainrings, Black Review Posted by GiantPandaisy May 31, 2018 in Drivetrain Components 6061-T6 alloy replacement rings 8, 9 and 10-speed compatible Black anodized with silver CNC machined teeth Made in U.S.A. Origin8 Alloy Non-Ramped Chainrings in three different sizes Cycling Origin8 Outdoor Recreation Parts & Components Sports & Outdoors