The BOTTOM BRACKET BB-UN300 featuring a square-type spindle and designed for a BSA 68mm shell is a precision-crafted component built to elevate your cycling experience with steadfast reliability and effortless performance. Engineered with a 113mm spindle length and inclusive of a fixing bolt, this bottom bracket delivers a secure and resilient connection that withstands the toughest pedaling forces while maintaining fluid motion.

More than just a mechanical part, the BB-UN300 embodies the synergy of engineering finesse and rugged endurance. Its sealed bearing assembly ensures smooth rotation, shielding critical internals from grit, moisture, and road grime. This protective design prolongs bearing life and keeps your ride whisper-quiet even after countless miles over varied terrain.

The square taper spindle provides a tried-and-true interface for cranksets, offering superb power transfer efficiency that translates every pedal stroke into responsive acceleration. Its design strikes a balance between robustness and simplicity, allowing for easy installation and maintenance without sacrificing durability.

The classic BSA 68mm threaded shell guarantees wide compatibility with a vast array of bike frames, making this bottom bracket a versatile upgrade or replacement option for riders who demand consistent performance and longevity. Whether you’re navigating urban streets, tackling rugged trails, or cruising on open roads, the BB-UN300 remains steadfast, delivering dependable support for your cycling ambitions.

This bottom bracket stands as a testament to quality and functionality—quietly powering your ride with unwavering precision and strength. It’s the foundation your drivetrain deserves, engineered to keep you moving forward, mile after mile, with confidence and ease.