Bike Bottom Bracket Double Bearing Bottom Bracket with Water Resistant Screws for Road Mountain Bike

Feature: 1. Sturdy: Bike bottom bracket is made of carbon steel spindle, stainless steel bearings, strong, long service life, sealed bearing components to provide better sealing and lubrication performance. 2. Protect Bike Frame: Integrated bike bottom bracket can protect frame, more power output, it s better than ordinary structure bottom bracket. The weight is very light and does not impose an extra burden on the bike. 3. Save Effort: The bike bottom bracket has fine workmanship, accuracy threads can be better connected, 2 bearings structure makes the spindle more flexible and less labor intensive. 4. 20 Slot Axis Cover: Made with pure steel, CNC machine cut for a one piece finish, fits tightly without shaking. The L (left) R (right) markers are clear, with arrow indicating the tightening direction. 5. Safe and Easy to Install: The bike bottom bracket no abnormal noise, prevent assembly stuck, safe to use. Double bearing thread design for better connection. Helps you install quickly and easily without adjustment. Specification: Item Type: Bike Bottom Bracket Material: Carbon Steel Spindle, Stainless Steel Bearings. Package List: 1 x Bike Bottom Bracket2 x Screw Note: We recommend 110mm for fixed gear bike; 118mm and 120mm for road bike; 120mm, 122mm and 127mm for mountain bike; 120mm for city bike.