Shimano Bottom Bracket UN300 Square 68-107 BSA

Square taper design ensures rock-solid crank stability and smooth pedaling—Shimano UN300 keeps your urban ride razor-sharp

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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 rock-solid stability and smooth rotation for your e-bike’s drivetrain. Designed to eliminate wobble and maximize energy output, this component is the ultimate solution for riders demanding durability and precision in every ride.

Key Features

  • Robust square taper interface ensures secure crank attachment.
  • High-quality sealed cartridge bearings for long-lasting smoothness.
  • Corrosion-resistant construction built to withstand urban and off-road conditions.
  • Optimized 68mm shell width fits standard BSA frames effortlessly.
  • Easy installation and maintenance for hassle-free upgrades.

Technical Specifications

  • Model: Shimano UN300
  • Interface: Square taper
  • Shell width: 68mm
  • Spindle length: 107mm
  • Thread type: BSA (English)
  • Bearing type: Sealed cartridge
  • Compatibility: Standard square taper cranks

Frequently Asked Questions

The Shimano UN300 is compatible with all standard square taper cranksets designed for a 68mm BSA shell width and 107mm spindle length.
The sealed cartridge bearings are engineered for long-term durability, providing smooth rotation while protecting against dirt and moisture for extended lifespan.

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