Bottom Bracket Sturdy Durable Protective Effect Important Parts Bike Accessories

Feature: 1. [Long Life] A double silicone sealing rings is installed at the port at the bottom of the bracket. Prolong service life and easy to install 2. [Sturdy and Durable] Aluminum alloy axle housing is made of aluminum alloy, which is durable and long service life 3. [Protective Effect]The screw system can protect the bike frame and output more power, let you ride fast 4. [Important Parts] Small size, easy to install and play a stabilizing role. It is an important part 5. [Steady Rotation] Easy to install, stable rotation, convenient installation and operation Specification: Item Type: Bottom Bracket Material: Aluminum Alloy Outer Diameter: Approx. 47mm 1.9in Inner Diameter: Approx. 29mm 1.1in Bottom Bracket Shell: Built In Approx. 68mm 2.7in, Approx. 73mm 2.9mm. Package List: 1 x Bottom Bracket2 x Washer