ORIGIN8

 6061-T6 alloy construction 8 and 9-speed compatible Silver anodized finish CNC Made in the U.S.A. 110mm 5-bolt 38T 6061-T6 Silver 8/9sp Standard

 AL6061-T6 alloy replacement rings 8, 9, and 10 speed compatible Black anodized with silver CNC machined teeth Available in ramped/pinned and standard styles Made in the USA 110mm 5-bolt 38T Ramped/Pinned Black/Silver 8/9/10sp Standard

 Narrow/Wide tooth design for chain retention on 1x systems 10, 11, or 12 speed compatible Mud clearing channels CNC AL7075 Swiss Alloy 110mm 5-bolt 38T 1x 7075AL Black 10/11sp Narrow/Wide

 Narrow/Wide tooth design for chain retention on 1x systems 10, 11, or 12 speed compatible Mud clearing channels CNC AL7075 Swiss Alloy 110mm 5-bolt 38T 1x 7075AL SRAM hidden bolt compatible Black 10/11sp Narrow/Wide