Bottom Bracket High Compatibility Good Waterproof Performance Better Quietness Bicycle Accessories for Mountain Bike

Feature: 1. Ceramic bearings have high strength, impact resistance, wear resistance and heat resistance, light weight, and efficient output. 2. Compared with the traditional bottom bracket, it has higher compatibility, better waterproof performance. 3. Bottom bracket shell is made of aluminum alloy, which is sturdy, durable and has a long service life. 4. Easy to install, stable rotation, convenient installation and operation, and better quietness. 5. Bottom bracket connects your crank and protects the smoother and durable application of the power transmission system. Specification: Item Type:Bottom Bracket Material: Aluminum Alloy,Ceramic Outer Diameter: Approx. 47mm 1.9in Inner Diameter: Approx. 24mm 1.0in Bottom Bracket Shell: Approx. 68mm 2.7in,Approx. 73mm 2.9in. Package List: 1 x Bottom Bracket