Enhance your bicycle's performance and durability with this high-quality Bicycle Bottom Bracket, designed for reliable and long-lasting use. Crafted from robust steel, this bottom bracket features a solid and durable construction that ensures extended service life and excellent resistance to wear. Its steel shell is engineered to absorb roundness tolerance during installation, providing a precise fit for 80mm or 100mm frame shells and reducing stress on your bike frame. Key Features: · Durable Steel Construction: Made from premium steel material, offering strength and longevity for demanding cycling conditions. · Roundness Tolerance Absorption: The steel shell effectively compensates for frame shell imperfections, ensuring smooth installation and enhanced stability. · Integrated System Design: Protects the bike frame while delivering improved power output, outperforming ordinary bottom bracket structures. · Compatible Frame Sizes: Suitable for 80mm and 100mm frame shells, accommodating various bicycle models with ease. · Multiple Size Options: Available in 80*142mm, 100*155mm, and 100*177mm sizes to fit different bike specifications. · Easy Installation: Designed for use with a BB tool to ensure safe and secure installation and replacement. Specifications: · Condition: 100% Brand New · Item Type: Bicycle Bottom Bracket · Material: Steel · Color: Black · Fit Frame Shell: 80/100mm · Cups Thread Size and Pitch: 34.798mm, 1.37 * 24TPI · Available Sizes: 80*142mm (3.1 * 5.6 inch), 100*155mm (3.9 * 6.1 inch), 100*177mm (3.9 * 7.0 inch) · Weight: Approx. 384g Package Includes: · 1 x Bottom Bracket with Screws This Bicycle Bottom Bracket is an essential upgrade for cyclists seeking enhanced power transfer and frame protection. Its durable steel construction and precision design ensure reliable performance and a secure fit, making it a perfect choice for both casual riders and cycling enthusiasts.