Enhance your cycling performance with this high-quality Bike BC Bottom Bracket, expertly crafted from durable aluminum alloy and nylon materials to deliver strength, precision, and long-lasting reliability. Designed to fit bottom bracket widths of 68-73mm (2.7-2.9in), this bottom bracket is perfect for mountain bikes, road bikes, fixed gear bikes, and folding bikes, ensuring versatile compatibility across various bicycle types. Key Features: · Superior Waterproof Design: Equipped with a separable rubber gasket that effectively seals sliding gaps, preventing dust and moisture infiltration while enabling smooth, gapless movement for enhanced durability and protection. · Low Resistance Lubrication: Double-sided sliding rubber gasket minimizes resistance during rotation, ensuring efficient lubrication and smooth bearing operation without added friction. · Enhanced Groove Sealing: Newly engineered end cover improves drainage sealing performance while reducing sealing resistance, providing a sleek, high-end appearance and reliable protection against contaminants. · Rigid Aluminum Alloy Shaft Bushing: The aluminum alloy shaft bushing delivers more direct crank power transmission by eliminating power loss caused by plastic elasticity, while also protecting bearings from damage due to increased rigidity. · Lightweight and High-Strength Aluminum Alloy Construction: Combines metal strength with the lightweight properties of aluminum, offering a robust yet light component that enhances overall bike efficiency. · Precision CNC Turning and Anodized Finish: Manufactured with CNC turning for accurate dimensions and enhanced durability, while the anodized surface treatment provides corrosion resistance and an attractive finish. Specifications: · Material: Aluminum Alloy + Nylon · Product Length: Approx. 90mm (3.5in) · Outer Diameter: Approx. 44mm (1.7in) · Inner Diameter: Approx. 24mm (0.9in) · Thread Pitch: Approx. 35mm (1.4in) · Wheelbase Compatibility: Designed for 68-73mm (2.7-2.9in) Threaded Bottom Brackets Package Includes: · 1 x Bike BC Bottom Bracket This Bike BC Bottom Bracket offers a combination of superior sealing, low friction, and high-strength materials to ensure efficient power transfer and robust performance for your cycling needs. Its versatile application and precision engineering make it an ideal upgrade for cyclists seeking a durable, reliable, and smooth bottom bracket solution.