SHIMANO Square Type Bicycle Bottom Bracket - BSA 73MM, Spindle: 122.5MM (LL123) - EBBUN300C23X

Shimano BB-UN300 Bottom Bracket - English 73 x 123mm Spindle Square

SHIMANO Square Type Bicycle Bottom Bracket - BSA 73MM, Spindle: 122.5MM (LL123) - EBBUN300C23X

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SHIMANO Square Type Bicycle Bottom Bracket - BSA 73MM, Spindle: 122.5MM (LL123) - EBBUN300C23X

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Shimano BB-UN300 Bottom Bracket - English 73 x 123mm Spindle Square

Overall Rating: 4.4 / 5 (average from multiple review sources, as of 1 Feb 2026)
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SHIMANO Square Type Bicycle Bottom Bracket - BSA 73MM, Spindle: 122.5MM (LL123) - EBBUN300C23X

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£40.04
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Product information

At a glance

  • Simple installation for quick upgrades.
  • Long-lasting materials for durability on any ride.
  • Smooth performance for effortless cycling experience.

Note: This text was created with the help of AI.

Upgrade Your Ride with the Shimano BB-UN300

The Shimano BB-UN300 BSA 73mm x 122.5mm is a fantastic choice for cyclists of all levels, from casual riders to serious enthusiasts. This bottom bracket is designed to enhance your bike's performance, ensuring a smoother and more enjoyable ride. Whether you're commuting to work, taking on rugged trails, or enjoying a leisurely ride through the park, this component will help you get the most out of your cycling experience. You can explore a variety of Bottom Brackets to fit your needs, but the BB-UN300 stands out for its reliability and efficiency.

Stellar Performance Features

The Shimano BB-UN300 boasts a range of impressive features that contribute to its stellar performance. This bottom bracket is built with a durable outer cup design, ensuring longevity and resilience against the elements. Its sealed cartridge construction minimizes maintenance while providing a smooth rotation, letting you focus on your ride without any distractions. Additionally, the 73mm width and 122.5mm spindle length make it ideal for a wide variety of frames and setups, ensuring compatibility with your bike. Key advantages include:

  • Easy Installation: The user-friendly design allows for straightforward installation, perfect for DIY bike repair enthusiasts.
  • Enhanced Durability: Made from quality materials that withstand wear and tear, ensuring it will keep you rolling for miles.
  • Smooth Operation: Experience a seamless ride with minimal friction, making every pedal stroke count.

Sleek Design and Compatibility

Not only does the Shimano BB-UN300 excel in performance, but it also sports a sleek and modern design that complements any bike aesthetic. The black finish is not only stylish but also functional, helping to repel dirt and grime while maintaining a clean look. This bottom bracket’s versatile specifications make it compatible with a variety of cranksets and bicycle frames, allowing you to customize your ride to fit your unique style.

Why Choose the Shimano BB-UN300?

Choosing the Shimano BB-UN300 means investing in a reliable component designed for cyclists who value performance and ease of use. It’s an excellent upgrade for your bike that promises not just to enhance your riding experience but also to extend the life of your components. With its combination of durability, performance, and sleek aesthetics, this bottom bracket is a no-brainer for anyone looking to elevate their cycling game. Don’t miss out on the chance to transform your ride into an effortless and enjoyable experience!

Note: This text was created with the help of AI.

Pros and cons

Pros

  • Easy installation for DIY repair
  • Durable materials for longevity
  • Smooth operation with minimal friction
  • Compatible with various setups
  • Sleek design repels dirt

Cons

  • May not suit all cyclists
  • Performance benefits vary by bike

Note: This text was created with the help of AI.

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SHIMANO Square Type Bicycle Bottom Bracket - BSA 73MM, Spindle: 122.5MM (LL123) - EBBUN300C23X

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, SEO-friendly product bullet points for the BB-UN300 Square Taper JIS Bottom Bracket: Compatible with JIS square-taper cranksets for seamless integration and reliable power transfer across various bicycle frames. Constructed with a durable hollow spindle and materials to enhance rotational efficiency and reduce weight, improving overall cycling performance. Designed with an 73mm BSA (English) shell interface and precise specifications, ensuring easy installation and optimal fit with a wide range of classic and mountain bike frames. Features a sleek black finish and engineered for long-lasting performance, perfect for everyday commuting, mountain biking, or recreational cycling.
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