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      The Hive 68/73mm 15G External Bottom Bracket

      • e*thirteen's BSA threaded bottom brackets adapt e*thirteen cranks to standard BSA threaded BB shells
      • Bearings feature high performance seals and custom grease specification for top-notch durability and smooth spinning
      • e*thirteen threaded BBs cannot be used to retrofit a BB30 crankset onto a BSA threaded frame
      • Large custom sealed 6806 bearings are replaceable and serviceable