Material: The bottom bracket shell and waterproof tube are CNC-machined from high-strength aluminum alloy, ensuring excellent durability, resistance to deformation, and long-term performance
Bearings: P5-grade bearings with high precision and smooth rotation for enhanced durability
Size: T47 bottom bracket, 68-73mm (External) / 86-92mm (Internal), suitable for 24mm, 29mm, and 30mm crank spindle diameters
Durable Waterproof Sleeve: Aluminum waterproof sleeves protect against rust and deformation under various conditions
Adjustable Spacers Included: Comes with adjustment spacers for perfect frame fitment and crank stability
