The BB-UN101 delivers Shimano’s legendary build quality in a sealed cartridge design. It is engineered to keep dirt and water out, ensuring long-lasting, maintenance-free performance for MTB, hybrid, and city bikes.
Key Features
Sealed Cartridge Construction: Effectively blocks moisture and road grit to prevent corrosion and ensure a smooth spin in all weather conditions.
Precise Chainline Control: The 123mm axle length (LL123) provides optimal alignment for various cranksets, reducing drivetrain wear.
"K" Designation: This specific model is designed with a chain case option, making it versatile for bikes with or without chain guards.
Easy Installation: Features a standard BSA thread that fits most modern aluminum and steel bicycle frames.
Note: Each unit comes with two crank arm fixing screws included in the package.
