CeramicSpeed Over Sized Pulley Wheel System for Shimano Dura Ace 9100 / R8000

CeramicSpeed OSPW System for Shimano Dura-Ace 9100 / Ultegra R8000 Due to worldwide demand; the CeramicSpeed Oversized Pulley Wheel System has been expanded with an offering now available for the Shimano Dura-Ace 9100 series and Shimano Ultegra R8000 groupsets. This new system combines a 13-tooth upper and 19-tooth lower pulley and fits cassettes up to 32t. An extremely strong; stiff and durable system; it is known to last around three to five times longer than your standard system; thanks to the larger number of teeth on the lower pulley. With the combination of high-quality CeramicSpeed bearings; lightweight components and a proven design; friction is reduced by 30%; resulting in a smoother ride and improved performance for any rider. Power savings reach up to 60% (2.4watts); which can make all the difference when racing for the line. Please note; when travelling; remember to dismount your entire rear derailleur with an Allen key; as the OSPW System will not fit in most bike travel bags and could be damaged if left on.