Bike Bottom Bracket Aluminum Alloy Bearing Size:BBT47-68-29 while the front vacuum compression

while the front vacuum compression pocket helps save space

High-pressure

Multi Purpose: With a unisex adult design

✔MATCH ALL CLOTHES: This arm sleeves cover can be matched with all tops

so pay attention to the sizing

Bike Bottom Bracket Aluminum Alloy Bearing Size:BBT47-68-29 while the front vacuum compressionAluminum Alloy Bicycle Bottom Bracket Built for durability and smooth performance, this aluminum alloy bottom bracket is designed to deliver reliable power transfer for road and mountain biking. The sealed bearing system provides effective protection against water and dust, helping reduce wear and corrosion for long lasting performance in various riding conditions. Anodized surface treatment enhances hardness and scratch resistance, improving overall