Ospw shimano 10 + 11s (ultegra + dura ace) alloy black coated

This CERAMICSPEED OVERSIZE rear derailleur hanger is an exclusive piece on the market. An element that improves the fluidity of the transmission to enjoy greater power, perfect for competition. It is made of high-end materials, such as carbon fiber on the temple and two extra-large aluminum wheels with 17 teeth, whose ceramic bearings have a surface 75% harder than steel, a guarantee of fluidity.