Shimano Square Type Bicycle Bottom Bracket - BSA 73Mm, Spindle: 122.5Mm (Ll123) - Ebbun300C23X | bottom-bike-brackets-and-accessories
genuine image
Shimano Square Type Bicycle Bottom Bracket - BSA 73Mm, Spindle: 122.5Mm (Ll123) - Ebbun300C23X | bottom-bike-brackets-and-accessories
Shimano BB-UN300 Square Spindle Bottom Brackets are designed to fit JIS square-taper cranksets and feature a hollow spindle.
Shimano Square Type Bicycle Bottom Bracket - BSA 73Mm, Spindle: 122.5Mm (Ll123) - Ebbun300C23X | bottom-bike-brackets-and-accessories
Nº de artículo: 48375664

Shimano Square Type Bicycle Bottom Bracket - BSA 73Mm, Spindle: 122.5Mm (Ll123) - Ebbun300C23X | bottom-bike-brackets-and-accessories

88% of respondents would recommend this to a friend

Nº de artículo: 48375664

UYU 1227

Price Details

Excluding Shipping & Custom charges ( Shipping and custom charges will be calculated on checkout )

*All items will import from Estados Unidos

En stock
Estados Unidos Importado de la tienda USA

QTY:

Haz tu pedido ahora y recíbelo por ahí Monday, Septiembre 28
Secured transactionsecured transaction

Ubuy works hard to protect your security and privacy. Our advanced payment security system ensures confidentiality by encrypting your information during transmission using AES (Advanced Encryption Standards) and SSL (Secure Socket Layer) protocols. Your payment details are 100% secure as we do not share your payment details with third party sellers.

Our Top Logistics Partners
  • fedex
  • dhl
Shimano BB-UN300 Square Spindle Bottom Brackets are designed to fit JIS square-taper cranksets and feature a hollow spindle.
Garantía U-Care:
Ninguno
Selecciona un plan
fast shipping

Fast
Shipping

free return

Free
Return*

secure packaging

Secure Packaging

100% original products

100% Original Products

pci-dss

PCI DSS Compliance

iso certified

ISO 27001 Certified

paypal payment
visa payment
mastercard payment
Note: Step Down Voltage Transformer required for using electronics products of Estados Unidos store (110-120). Recommended power converters Comprar ahora.

What Stands Out

Durable Construction
Crafted for longevity, the Shimano BB-UN300 uses high-quality materials to withstand rigorous riding conditions, ensuring a sustained performance that outlasts competitors.
Precision Fit
Designed to deliver perfect alignment, the 73 x 123mm spindle size ensures an ideal fit for various bike frames, enhancing smooth pedaling efficiency and overall ride quality.
Easy Installation
Featuring a square taper JIS design, the BB-UN300 allows for straightforward installation and compatibility with a wide range of cranks, making it accessible for both skilled and amateur cyclists.

Detalles de producto

Get the best deals on SHIMANO Square Type Bicycle Bottom Bracket - BSA 73MM at Ubuy Uruguay. Explore a wide range of bike bottom brackets and enjoy fast shipping worldwide.
Brand NameSHIMANO
UPC192790622194
Part NumberEBBUN300C23X
ManufacturerShimano
ModelEBBUN300C23X
Unit Count1.0 Count
Included ComponentsBottom Brackets
Item Dimensions6.18 x 0.62 x 1.77 inches (15.7 x 1.6 x 4.5 cm)
Material TypeSteel Bearings
BrandSHIMANO
MaterialSteel Bearings
Item dimensions L x W x H6.18 x 0.62 x 1.77 inches (15.7 x 1.6 x 4.5 cm)
Number of Items1

Who Should Buy?

Suitable For
  • Casual Cyclists

    Ideal for those who ride occasionally and need a reliable, cost-effective bottom bracket for their bike.

  • Budget Builders

    Great for cyclists building or upgrading a bike on a budget, offering quality performance without breaking the bank.

  • Recreational Cyclists

    Perfect for riders who value comfort and durability in their components, suitable for daily commuting.

Not Suitable For
  • Competitive Racers

    Not suitable for high-performance racing setups where weight and advanced technology are critical for success.

DESCRIPCIÓN DEL PRODUCTO

Shimano Square Type Bicycle Bottom Bracket - BSA 73Mm, Spindle: 122.5Mm (Ll123) - Ebbun300C23X | bottom-bike-brackets-and-accessories

¿Tienes alguna consulta? Chatea con nosotros

Preguntas y respuestas de los clientes

  • Pregunta: What is the Shimano BB-UN300 Bottom Bracket made for?

    Respuesta: The Shimano BB-UN300 Bottom Bracket is designed for a wide range of bicycles, particularly those utilizing a square taper interface. It is specifically engineered to accommodate English threading and has dimensions of 73mm shell width and 123mm spindle length. This makes it a perfect choice for mountain and road bikes alike, ensuring smooth pedaling and reliable performance. The bottom bracket provides the necessary support for your crankset, allowing for efficient power transfer and a more comfortable cycling experience.
  • Pregunta: How do I install the Shimano BB-UN300 Bottom Bracket?

    Respuesta: Installing the Shimano BB-UN300 requires a few tools, including a bottom bracket tool and possibly a crank arm puller. To install, first, ensure the bike is secure. Remove the old bottom bracket using the tool, and clean the shell before installation. Grease the threads of the new BB-UN300, then thread it into the frame until snug. Finally, attach your crankset. Proper installation minimizes wear and tear, ensuring optimal performance and longevity of your bike's drivetrain.
  • Pregunta: Is the Shimano BB-UN300 compatible with any bike?

    Respuesta: The compatibility of the Shimano BB-UN300 depends on your bike's specifications. It is designed for frames that use an English threaded bottom bracket system, specifically with a 73mm shell width. If your bike has a square taper crankset, it's highly likely that this bottom bracket will be compatible. Always check your bike's specifications or consult your local bike shop to confirm compatibility to ensure the best fit and performance during your rides.
  • Pregunta: What are the benefits of using the Shimano BB-UN300 Bottom Bracket?

    Respuesta: The Shimano BB-UN300 Bottom Bracket provides several benefits to cyclists. Its square taper design enhances the stiffness and efficiency of power transfer from the pedals to the drivetrain, resulting in smoother rides. The materials used ensure durability and resistance to wear and tear, which is crucial for consistent performance. Additionally, its ease of maintenance allows for simpler adjustments, making it an excellent choice for both casual cyclists and serious enthusiasts looking to enhance their biking experience.
  • Pregunta: What maintenance does the Shimano BB-UN300 require?

    Respuesta: To maintain the Shimano BB-UN300 Bottom Bracket, regular inspections are recommended. Check for any signs of wear, play in the crankset, or unusual noises while pedaling. Cleaning the area around the bottom bracket and applying fresh grease can help prolong its lifespan. If you encounter stiffness during rotation, it may indicate that the bearings need attention. By keeping your BB-UN300 clean and lubricated, you can ensure a smooth pedaling experience and effective power transfer throughout your rides.
  • Pregunta: What tools do I need to replace the Shimano BB-UN300 Bottom Bracket?

    Respuesta: To replace the Shimano BB-UN300 Bottom Bracket, you'll need specific tools, including a bottom bracket tool compatible with the Shimano BB standard. A crank arm puller can also be beneficial for removing the crankset before the replacement. Additionally, having a torque wrench on hand can help ensure that all components are installed securely, maintaining the correct specifications for safety and performance. Using the right tools makes the replacement process smoother and minimizes the risk of damage to the components.
  • Pregunta: How does the Shimano BB-UN300 perform under various riding conditions?

    Respuesta: The Shimano BB-UN300 is designed for reliable performance across various riding conditions, whether on paved roads, gravel paths, or mountain trails. Its sturdy construction ensures that it can handle the rigors of off-road cycling while maintaining efficiency on more straightforward surfaces. Cyclists have reported that it provides a solid feel and good response when pushing hard during climbs or sprinting. This adaptability makes it a versatile choice for riders looking to enjoy different terrains without changing their bottom bracket.
  • Pregunta: Can I use this bottom bracket with different cranksets?

    Respuesta: Yes, the Shimano BB-UN300 is compatible with a range of cranksets that utilize a square taper design. This means you can use it with various Shimano and other compatible cranksets. However, it’s crucial to ensure that the length and type of cranksets match the specifications of your bicycle. Riders looking to optimize their bike setup can benefit from this interchangeability, allowing them to customize their bike's performance based on their individual riding style and preferences.
  • Pregunta: What is the difference between English and Italian bottom brackets?

    Respuesta: The primary difference between English and Italian bottom brackets lies in their threading and width specifications. The English bottom bracket, like the Shimano BB-UN300, features a standard threading that is often more common and easier to find. In contrast, Italian bottom brackets typically have a wider shell and different threading, which can affect compatibility with frames and cranksets. Understanding these differences is crucial for selecting the right bottom bracket to ensure optimal performance and avoid compatibility issues.
  • Pregunta: Where can I buy Shimano BB-UN300 Bottom Bracket in Uruguay?

    Respuesta: You can conveniently purchase the Shimano BB-UN300 Bottom Bracket from Ubuy in Uruguay. Ubuy offers a reliable platform for finding cycling components, ensuring that you have access to genuine products that meet your biking requirements. With Ubuy's user-friendly interface and comprehensive product details, finding the right bottom bracket for your bike has never been easier.

SHIMANO Bottom Brackets Editorial Review

The SHIMANO Square Type Bicycle Bottom Bracket - BSA 73MM with a spindle length of 122.5MM LL123 is a great replacement for an old bottom bracket. It has sealed bearings that are slightly smoother and quieter. Customers were satisfied with the product; it was a perfect fit, and they experienced no problems with it. Some customers, however, had issues with the lack of instructions and the screws needed to re-connect the cranks as they are not supplied. The product's reputation for longevity was Considered high quality by most customers.

Customer Reviews & Ratings

1 valoraciones de los clientes
  • 5 estrella
    100%
  • 4 estrella
    0%
  • 3 estrella
    0%
  • 2 estrella
    0%
  • 1 estrella
    0%

Revisar este producto

Comparte tus ideas con otros clientes

ventajas

  • Perfect fit for a 73mm bottom bracket shell
  • Sealed bearings make a smoother, quieter ride
  • High-quality reputation for longevity

Contras

  • Lack of instructions and supplied screws

Platform Trust & Buyer Confidence

trustpilot logo
4.2/5 9477 reseñas
Read reviews
JK
Jasmin
Verified buyer

“Great products and very good service: very easy and very fast international delivery.”

9 September 2026 · via Trustpilot
AG
Anke
Verified buyer

“Wonderful online shopping experience, smooth transaction from the start. Payment method works conveniently and delivery is unexpectedly fast and reliable. You go the extra mile for service. What makes this even more amazing, you deliver to Namibia. I will remain a happy Ubuy customer and will increase my purchases for sure! Thank you!”

10 September 2026 · via Trustpilot
H
Hazel
Verified buyer

“Very easy to find the products what you need, and so fast delivery, that’s why I highly recommended to others costumers to used ubuy.”

10 September 2026 · via Trustpilot
O
Opaleye
Verified buyer

“I received exactly what I ordered I was skeptical about your site because that was my first time to order. But the order came timely and neatly packaged. I was not disappointed. Thank you.”

11 September 2026 · via Trustpilot
AC
Adele
Verified buyer

“Easy to find and order what you want on the website. Delivery is quick to the UK”

8 September 2026 · via Trustpilot
Pago seguro Global Delivery Easy Returns Genuine Products

Product Price History

Información importante

  • Limitaciones: Para los productos enviados al extranjero, ten en cuenta que cualquier garantía del fabricante puede no ser válida; las opciones de servicio del fabricante pueden no estar disponibles; los manuales del producto, las instrucciones y las advertencias de seguridad pueden no estar en los idiomas del país de destino; los productos (y los materiales que los acompañan) pueden no estar diseñados de acuerdo con las normas, especificaciones y requisitos de etiquetado del país de destino; y los productos pueden no ajustarse al voltaje del país de destino y a otras normas eléctricas (lo que requiere el uso de un adaptador o convertidor, si procede). El destinatario es responsable de asegurarse de que el producto puede ser importado legalmente al país de destino. Cuando hagas un pedido a Ubuy o a sus filiales, el destinatario es el importador registrado y debe cumplir todas las leyes y normativas del país de destino.
  • No todos los productos que aparecen en Ubuy están a la venta, ya que Ubuy es un motor de búsqueda a nivel mundial. Los productos están sujetos a las normas de exportación/comercio.

UYU 1227

Haz tu pedido ahora y recíbelo por ahí Monday, Septiembre 28

QTY:

Secured transactionsecured transaction

PCI DSS compliant and ISO 27001:2022 certified, with encrypted payments and full buyer protection on every order.

Our Top Logistics Partners
  • fedex
  • dhl
Fastest cross-border delivery

características y beneficios

  • Fits JIS square-taper cranksets
  • Crankarm fixing bolts sold separately
  • Hollow spindle
  • BB Shell Width (mm):73 mm
  • Bottom Bracket Shell I.D.:1.37
  • Spindle Length:122.5

Ubuy Assurance

Experience worry-free shopping with 100% original products, PCI DSS-compliant payment security, ISO 27001-certified data protection, the fastest cross-border delivery, free returns *, and secure packaging on every order.