Fiction Sealed Bottom Bracket BearingWhether you're giving your current setup a refresh or simply wanting an extra bottom bracket bearing to keep as a spare, this genuine Stolen/Fiction spare part is a perfect choice of replacement. Specifically designed for frames that feature a MID bottom bracket (BB) shell, making it ideal for use on your Savage or Revolver MID Type BB. Sold individually.Features: Use: BMX Compatibility: Will fit any frame with a MID BB shell Single or Pair: Single Genuine Stolen/Fiction spare partManufacturer's Part Numbers: S577 Silver 19mm S578 Silver 22mmBuy Fiction Components from Chain Reaction Cycles, the World's Largest Online Bike Store.