BOX Prime 9 Chains BX-CN1-P9A126-BK

- Prime 9 Technology for wide range without complexity\n- Wider chain is strong and durable \n- 9 speed chain has outer width of normal 9 speed but a narrower inner width to match 10/11 speed narrow-wide chainrings. Compatible with most 10, 11, and 12 speed chainrings as well as BMX 3/32" chainrings and cogs\n- 8 speed chain has outer width of normal 8 speed but a narrower inner width, optimized for use with Box Four Narrow/Wide chainrings\n- 3rd party web sales must be an Authorized Dealer