Here's a quick overview of our return and refund policy: 7-Day Return Window : You can initiate a return within 7 days of receiving your product. Eligibility : Items must be unused, in original condition, with all tags and packaging. Only select items like apparel (helmets, jerseys, gloves, etc.) are eligible. Non-Returnable Items : Wetsuits and items discounted over 5% are not eligible for returns. Compatibility Issues : Returns are not accepted for compatibility-related issues unless the product description on our website was incorrect. If you're unsure, please contact us before ordering. Shipping & Processing : Return shipping is to be arranged by the customer. No pickups available. Refund Options : Choose between exchange, store credit, or monetary refund (after deductions for shipping and transaction fees). Order Cancellations : Only possible before the order is processed. For full details, visit our Return & Refund Policy page.

Shimano BB-UN300-K Square Type Bottom Bracket

Name: Shimano BB-UN300-K Square Type Bottom Bracket
Brand: Shimano
SKU: EBBUN300KB23XW
Price: 1230.0 INR
Availability: InStock

EBBUN300KB23XW

₹1,230

Size

68x122.5 mm (LL123)

Product variants

In the Box

1x Shimano BB-UN300-K (68x122.5 mm (LL123)) Bottom Bracket
1x 0.7 mm Spacer

Durable and Reliable Square Taper Bottom Bracket

Description

The Shimano BB-UN300-K is a durable square taper bottom bracket designed to deliver consistent performance. Its cartridge bearing system ensures smooth rotation and long-lasting reliability, ideal for various cycling applications.

Precise Compatibility: With a 68mm BSA threaded shell and a 122.5mm spindle length, the BB-UN300-K is compatible with a wide range of square taper cranksets. This bottom bracket also includes a 0.7mm spacer for precise fitment, ensuring optimal alignment and functionality.

Enhanced Durability: Built to withstand rigorous use, the BB-UN300-K features Shimano’s renowned quality and performance. The sealed cartridge design keeps out dirt and moisture, providing a maintenance-free solution that stands up to challenging conditions.

Optimized for Chaincases: Specifically designed for chaincase systems, this bottom bracket is a great choice for bikes with enclosed chain setups. It ensures smooth drivetrain operation while offering protection against environmental elements.

The Shimano BB-UN300-K is user-friendly, with straightforward installation for mechanics and DIY enthusiasts alike. Whether upgrading or replacing, it offers excellent performance and reliability for square taper cranksets.

Features

Smooth Rotation and Reliability: Sealed cartridge bearing system ensures consistent performance and maintenance-free operation.
Precise Compatibility: Fits 68mm BSA threaded shells with multiple spindle lengths for optimal alignment.
Enhanced Durability: Shimano’s sealed design resists dirt and moisture for long-lasting use in tough conditions.
Chaincase Optimization: Specially designed for chaincase systems, ensuring smooth drivetrain operation and protection.
Effortless Installation: User-friendly setup for both mechanics and DIY enthusiasts upgrading square taper cranksets.

Specifications

Model No: BB-UN300-K
Series: Shimano
Structure|For Chain Case: Yes
Spindle|Square Type: Yes
Axle Length/Shell Width (mm)|MM110|68 (BC1.37): Yes
Axle Length/Shell Width (mm)|117.5|68 (BC1.37): Yes
Axle Length/Shell Width (mm)|XL118|68 (BC1.37): Yes *
Axle Length/Shell Width (mm)|D-NL 122|68 (BC1.37): Yes **
Axle Length/Shell Width (mm)|D-EL 127|68 (BC1.37): Yes
Axle Length/Shell Width (mm)|LL123|68 (BC1.37): Yes ***
Remarks: * w/ Crank Arm Fixing Screws Spec. only
** w/ Crank Arm Fixing Screws Spec. is available
*** w/ 0.7mm Spacer

Shimano Warranty Information

Shipping Policy

We ship across India with free shipping on orders above ₹2,000 (₹99 for orders below ₹2,000). Cash on Delivery is available up to ₹20,000, with additional COD fees based on order value. Orders typically arrive within 3–6 working days, though delays may occur.

Note: Most Shimano products may take longer to ship. View full shipping policy

Returns & Refunds

Here's a quick overview of our return and refund policy:

7-Day Return Window: You can initiate a return within 7 days of receiving your product.
Eligibility: Items must be unused, in original condition, with all tags and packaging. Only select items like apparel (helmets, jerseys, gloves, etc.) are eligible.
Non-Returnable Items: Wetsuits and items discounted over 5% are not eligible for returns.
Compatibility Issues: Returns are not accepted for compatibility-related issues unless the product description on our website was incorrect. If you're unsure, please contact us before ordering.
Shipping & Processing: Return shipping is to be arranged by the customer. No pickups available.
Refund Options: Choose between exchange, store credit, or monetary refund (after deductions for shipping and transaction fees).
Order Cancellations: Only possible before the order is processed.

For full details, visit our Return & Refund Policy page.