The HS-R080 hub is equipped with a special patented design. R080 is designed to fit the "pressure angle" bearing, which is different from the pressure angle in 0 degrees of the bearing embedded in the universal hubs. There is even an adjustment system for fine adjustment. The design of the pressure angle makes the running hub smoother, and more supportive in terms of lateral rigidity. The bearing of the pressure angle not only can extend the service life of the bearing but also can be easily repaired. Read more!