Bicycle Bottom Axle High Strength Impact Resistance Bike Bottom Brackets for Outdoor

Feature: 1. The AL7075 aluminum alloy bottom bracket shell is made of aluminum alloy, which is sturdy and durable and has a long service life 2. Ceramic bearing has high strength, impact resistance, wear resistance and heat resistance, light weight and glossy, high efficiency. 3. The new structure of T47 has higher compatibility with crankshaft, better waterproof performance and quietness. 4. It can connect your crank arm and protect the stable and long lasting power applied to your transmission system. 5. You do not need professionals, you can also operate and install by yourself. Light weight and easy to install. Specification: Item Type: Built in Bearing Bottom Shaft Material: Aluminum Alloy+Ceramics Outer Diameter: Approx.47mm 1.9in Inner Diameter: Approx.24mm 0.9in Five Links: Approx.86.5mm 3.4in. Package List: 1 x Bicycle Bottom Axle