The bearing oil developed by us can not only be completely integrated into the metal pores, but also can improve the surface finish of the metal cleaning equipment  and form a protective film on the surface, so that the bearing oil can be perfectly integrated into the balls and the balls under high-speed rotation and heating. Therefore, the smoothness will only gradually increase after choosing our parts and using it, and even when pedaling, there will be a sense of thrust. Not only is it smooth, but it can also improve the riding quality.