The CeramicSpeed OSPW RS represents a leap forward in the evolution of oversized pulley wheel systems for road groupsets. With its modern and angular design, the OSPW RS embraces contemporary aesthetics, seamlessly integrating with the latest design trends in bikes and groupsets. The new OSPW has enhanced strength and durability, with a reinforced cage design that ensures optimal performance even under the most demanding conditions. This version is compatible with your Shimano 105 Di2 electronic groupset, helping it remain efficient and function as silently as possible. It also has the innovative Alpha discs which are completely solid to protect the bearings. The CeramicSpeed OSPW is always evolving to make your ride smoother.