OSPW Pulley Novaride untuk Shimano 105 R7000 Designed by our French Engineers NOVA CARBONE Ceramic rear derailleur improves the fluidity of your transmission, enhance efficiency to satisfy the most demanding. Made in very high-end materials: an ultra-light carbon fiber and ceramic bearings. Two Oversized aluminum wheels, which coupled with ceramic bearings decrease the chain winding angle with minimal friction. In this version, the Oversize cage is only compatible with the Shimano 105 R7000 Features : Weight : 72 g Watt Saved : 4 - 5 W compared to a conventional cage.