SHIMANO BB-RS501 Right & Left Adapter Threaded Bottom Bracket

The SHIMANO BB-RS501 Right & Left Adapter Threaded Bottom Bracket is designed to deliver smooth pedaling performance, reliable durability, and precise compatibility with Shimano Hollowtech II crank systems. Built with Shimano’s trusted engineering standards, this bottom bracket offers a strong and lightweight construction that enhances drivetrain efficiency and overall riding experience. Its specially designed sealing structure helps protect the bearings from dust, water, and dirt, extending service life even during regular riding conditions. The anodized aluminum cups provide excellent strength while keeping the overall weight low for better bike performance. Designed specifically for riders looking for long-term reliability and smooth rotation, the BB-RS501 is perfectly matched with Hollowtech II 24mm crank spindles. Whether you ride on roads daily or upgrade your existing drivetrain setup, this bottom bracket offers dependable and consistent performance.

Key Features

• Perfect Compatibility: Designed specifically for Shimano Hollowtech II 24mm crank spindles

• Special Seal Design: Helps reduce dirt and moisture entry for longer bearing life

• Lightweight Construction: Anodized aluminum cups reduce weight while maintaining durability

• Smooth Performance: Provides efficient power transfer and low-friction rotation

• Threaded Design: BSA threaded structure ensures secure and stable installation

• Shimano Reliability: Built with Shimano quality standards for long-lasting use

Product Specifications

• Product Name: SHIMANO BB-RS501 Right & Left Adapter Threaded Bottom Bracket

• Series: Tiagra

• Spindle Interface Type: Shimano Hollowtech II

• Crank Compatibility: 24mm Hollowtech II crank spindle

• BB Shell Width: 68mm English

• BB/Frame Interface: English (BSA Thread)

• Material: Anodized Aluminum Cups

• Weight: 92g

• Color: Silver

Bearing Protection & Durability

• Shimano's special sealing design helps reduce the entry of dust, water, and contaminants

• Built for extended bearing life and reduced maintenance requirements

• Suitable for daily riding conditions where durability and smooth operation matter

• Maintains reliable performance over long riding periods

Easy Operation / Usage

• Install the BB-RS501 into a compatible 68mm English threaded frame

• Attach Shimano Hollowtech II compatible cranksets

• Tighten according to Shimano torque specifications

• Check for smooth crank rotation after installation

Why Choose This Product

• Genuine Shimano performance and reliability

• Lightweight yet durable construction

• Improved bearing protection for longer lifespan

• Smooth and efficient power transfer

• Ideal for Tiagra and Hollowtech II crank systems

• Suitable for road and performance-focused bikes

In the Box

• 1 x Shimano BB-RS501 Right Adapter

• 1 x Shimano BB-RS501 Left Adapter