RaceFace CINCH Bottom Bracket: BSA 83mm Shell x 30mm Spindle, External SealRace Face bottom brackets for use with 30mm spindle cranksets in the Race Face CINCH crank family. Compatible with standard threaded BSA shells Standard 6806 retainer bearings Includes inner plastic sleeve and spacer; additional BB fitments can be accommodated with CINCH spacer kits Inner sleeve protects against water Rubber seal located on the bearing's external side helps to reduce the risk of water penetration Item Specifications BB Shell Width