Enhance your bike’s performance and durability with this high-quality Bottom Bracket, designed for reliable and long-lasting use. Crafted from robust steel, this bottom bracket features a solid construction that ensures a long service life and superior strength to withstand rigorous cycling conditions. The steel shell is engineered to absorb roundness tolerance, allowing for precise fitting into the bracket bottom installation ports, reducing wear and enhancing stability. Key Features: · Durable Steel Construction: Made from premium steel material, providing exceptional strength and wear resistance for extended durability. · Roundness Tolerance Absorption: The steel shell design effectively absorbs roundness tolerance, ensuring a secure and precise fit within the frame shell installation ports. · Integrated System Design: Protects the bike frame while delivering more power output, outperforming ordinary bottom bracket structures for improved cycling efficiency. · Compatibility: Suitable for 80mm and 100mm frame shells, making it versatile for a variety of bike models. · Safe Installation: Recommended to use a BB tool for installation and replacement to ensure safety and proper fitting. · Dual Bearing Structure: Equipped with two bearings for smooth rotation and enhanced performance. Specifications: · Material: Steel · Suitable Frame Shell Size: 80mm / 100mm · Weight: Approximately 420g (14.82oz) · Size Options: 80*142mm / 100*155mm / 100*177mm · Cups Thread Size and Pitch: 34.798mm, 1.37*24TPI · Structure: 2 Bearings Package Includes: · 1 x Square Hole Axis · 2 x Screws Please note that this product may be shipped as either the new or old type, selected randomly. Ensure acceptance of this before placing your order. This bottom bracket is an essential upgrade for cyclists seeking enhanced power transfer, frame protection, and reliable performance on every ride.