This CERAMICSPEED OVERSIZE Coated Shimano R9100 / R8000 rear derailleur pin is an exclusive piece on the market.An element that improves transmission fluidity to enjoy greater power, perfect for competition.It is made of high-end materials, such as the carbon fiber in the pin and two extra large aluminum sheaves with 17 teeth, whose ceramic bearings have a surface 75% harder than steel, a guarantee of fluidity.In this version, the Oversize pin is compatible with Shimano Dura Ace R9100 and Ultegra R8000 short-leg rear changes.