Bike Bottom Bracket with Sealed Steel Bearings, Aluminum Alloy BB38630

[Aluminum Alloy Frame]: Crafted from high-strength aluminum alloy for lightweight performance and noise reduction, ensuring smooth pedaling and lasting durability; [Integral Sealed Steel Bearings]: Engineered with sealed steel bearings to maintain lubrication, offering excellent and waterproof protection for harsh riding conditions; [Sturdy and Stable Design]: Reinforced lateral stability with robust materials to prevent loosening and eliminate abnormal noise during intense rides; [User-Friendly Adjustment]: Allows precise chainline adjustment for optimal crankring alignment, enhancing ride efficiency and comfort; [Precision Machining]: Manufactured with accurate tolerances to boost bearing service life and ensure reliable sealing performance in various environments

What's in the box
1 x Bottom Brackets