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

Feature: 1. Aluminum alloy bottom bracket shell is made of aluminum alloy, which is sturdy and durable and has a long service life. 2. Compared with the traditional bottom bracket, it has higher compatibility, better waterproof performance. 3. Better airtightness, enhanced by T47 characteristics of the sealed waterproof tube, strong waterproof performance. 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 Outer Diameter: Approx. 47mm 1.9in Inner Diameter: Approx. 29mm 1.1in Bottom Bracket Shell: Approx. 86.5mm 3.4in. Package List: 1 x Bottom Bracket2 x Washer