S&M Bikes Mid Bottom Bracket 24mm KitThe S&M Mid Bottom Bracket Kit includes 2 precision sealed bearings, 2 cones, and internal spacer for use in any Mid BB frame. Get rid of that grinding feeling while pedaling and throw in some new bearings. Features: CNCed anondized Aluminum cone spacers Avail to fit 19mm and 24mm spindles Compatible with press fit Mid bottom brackets Strong and smooth running R 12 bearings