Bike Bottom Bracket Aluminum Alloy Bearing summer The PU cushions are softer

The PU cushions are softer and fits better

The out side is 600D waterproof nylon

Dimensions: S: 9

and the design of the thickened sponge on both sides can protect your phone and gears well

Bike Bottom Bracket Aluminum Alloy Bearing summer The PU cushions are softerAluminum 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