BOX Prime 9 Cassette BX-CS4-08A1142-BK

- Prime 9 Technology offers fewer gears with wider spacing to ease set-up, provide a better chainline, and result in less wear and tear\n- Ultra-wide ratio with consistent progression\n- Fits HG splined Shimano/SRAM 8-10sp freehubs \n- Box Two features hardened steel cogs pinned to aluminum spiders and an ED black finish\n- Box Three features cold rolled steel cogs pinned to aluminum spiders; wide or x-wide range available\n- Box Four features 8 speeds with Prime 9 Technology\n- 3rd party web sales must be an Authorized Dealer