Shimano Bottom Bracket UN300 Square 68-127.5 BSA

Precision-engineered square taper design boosts your pedaling efficiency and durability, powered by Shimano’s trusted BB-UN300 tech

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Unleash Seamless Power Transfer with Precision Engineering.

Struggling with inefficient pedaling and unreliable crank performance? The Shimano UN300 square taper bottom bracket delivers a robust, smooth, and durable solution for your e-mobility setup. Designed to eliminate creaks and maximize energy transfer, this bracket ensures your ride stays efficient and responsive every time you hit the road.

Key Features

  • Precision square taper interface for secure crank attachment.
  • Durable cartridge design for long-lasting performance.
  • Optimized for 68mm shell width with 127.5mm spindle length.
  • Reliable BSA threading for easy installation and maintenance.
  • Engineered by Shimano for trusted quality and compatibility.

Technical Specifications

  • Type: Bottom bracket / Bracketas
  • Model: Shimano BB-UN300
  • Interface: Square taper (vierkant)
  • Shell width: 68 mm
  • Spindle length: 127.5 mm
  • Threading: BSA (English standard)

Frequently Asked Questions

The Shimano UN300 is compatible with cranksets that use a square taper interface and fit a 68mm shell width with 127.5mm spindle length.
Installation requires threading the unit into a 68mm BSA bottom bracket shell and securing the crankset onto the square taper spindle. Professional installation is recommended for optimal performance.

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