Upgrade your bike's performance with this high-quality Bicycle Bottom Bracket, crafted from durable aluminum alloy for enhanced strength and long-lasting reliability. Designed for easy installation and superior protection, this bottom bracket features a robust construction that ensures stable power transfer while safeguarding your bike frame against wear and damage. Key Features: · Premium Aluminum Alloy Construction: Made from sturdy aluminum alloy, this bottom bracket shell offers excellent durability and resistance to deformation, ensuring a longer service life. · Double Silicone Sealing Ring: Equipped with dual silicone sealing rings at the port base to effectively prevent dirt and moisture intrusion, protecting internal components and maintaining smooth operation. · Frame Protection Design: The advanced threaded system design safeguards your bicycle frame while optimizing power output and providing a more secure fit compared to conventional structures. · Long-Lasting Performance: The corrosion-resistant alloy material and improved sealing prolong the component’s lifespan, making it a reliable choice for various cycling conditions. · Precision Dimensions: Outer diameter approximately 47mm (1.85in), inner diameter approximately 30mm (1.18in), designed for built-in five-way compatibility with 86/92mm bottom bracket shells. Specifications: · Item Type: Bicycle Bottom Bracket · Material: Aluminum Alloy · Outer Diameter: Approx. 47mm / 1.85in · Inner Diameter: Approx. 30mm / 1.18in · Five Way Built-in: Approx. 86/92mm Package Includes: · 1 x Bicycle Bottom Bracket This Bicycle Bottom Bracket combines durable aluminum alloy construction with an effective sealing system for superior protection and longevity. Its precise fit and sturdy design help improve your bike’s power transfer and frame protection, making it an essential upgrade for cyclists seeking performance and reliability.