The new Dura Ace from Shimano answers the question of many pros and ambitious amateurs as to whether and how the current, immensely high level of performance could be further increased. Each individual Dura Ace R9110 component is designed to work as efficiently as possible with all other components of the system. This shows the core of Shimano's component-developed-as-a-system philosophy particularly clearly. The result is called SYSTEM SUPREMACY - the superiority of the system over the sum of the individual parts.The Shimano Dura Ace direct mount rim brake gives you the best balance between stiffness, weight and braking force. In addition, the gap between the tyre and the brake body has been kept small for a slimmer appearance.