Enhance your bike’s performance and durability with this high-quality Bike Bottom Bracket, expertly crafted from a combination of aluminum alloy and nylon materials. Designed for seamless integration with bottom bracket widths of 68-73mm (2.7-2.9 inches), this bottom bracket offers superior strength, lightweight construction, and reliable operation for mountain bikes, road bikes, fixed gear bikes, and folding bikes. Key Features: · Superior Waterproof Design: Equipped with a separable rubber gasket that ensures gapless movement, effectively preventing dust and moisture intrusion to protect the bearing and extend its lifespan. · Low Resistance Lubrication: The double-sided sliding separable rubber gasket minimizes rotational resistance, maintaining high lubrication efficiency and smooth operation without increasing bearing wear. · Enhanced Groove Sealing: The innovative end cover design significantly improves drainage sealing performance while reducing sealing resistance, contributing to a sleek and high-end appearance. · Durable Aluminum Alloy Construction: Made from high-strength aluminum alloy, this bottom bracket combines exceptional metal strength with lightweight properties for enhanced bike handling and longevity. · Rigid Shaft Bushing: The shaft bushing provides direct crank power transmission without plastic elasticity, reducing power loss and preventing bearing damage for improved rigidity and efficiency. · Precision Engineering: Features sealed bearing, CNC turning, and anodized finish for reliable performance, corrosion resistance, and a polished look. Specifications: · Material: Aluminum Alloy + Nylon · Color: Colourful · Length: Approx. 90mm (3.5 inches) · Outer Diameter: Approx. 44mm (1.7 inches) · Inner Diameter: Approx. 24mm (0.9 inches) · Thread Pitch: Approx. 35mm (1.4 inches) · Compatible Bottom Bracket Width: 68-73mm (2.7-2.9 inches) Suitable For: Mountain bikes, road bikes, fixed gear bikes, folding bikes Package Includes: · 1 x Bike Bottom Bracket This Bike Bottom Bracket delivers a perfect balance of strength, lightweight design, and waterproof sealing, making it an ideal upgrade for cyclists seeking durability and smooth crank operation across various bike types.