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keeping your drivetrain in top shape for optimal performance
and the GameChanger is your secret weapon in this battle
and every stretch of road
and smooth modulation
maintaining peak performance
Shimano BB-UN300-K Square Type Bottom Bracket Featured keeping your drivetrain in topThe Shimano BB UN300 K is a durable square taper bottom bracket designed to deliver consistent performance. Its cartridge bearing system ensures smooth rotation and long lasting reliability, ideal for various cycling applications. Precise Compatibility: With a 68mm BSA threaded shell and a 122. 5mm spindle length, the BB UN300 K is compatible with a wide range of square taper cranksets. This bottom bracket also includes a 0. 7mm spacer for precise