Nova Ride Shimano Ultegra/Dura-Ace 12v pulley system, this product consists of a carbon cage and 2 7075 aluminum rollers (14 and 17 teeth) with fully ceramic sealed bearings. In this version, the oversized Cage is only compatible with Shimano Ultegra R8100/Dura-Ace R9200. The NOVA CARBONE ceramic gearbox cage improves the fluidity of your transmission, allowing a power gain to suit the most discerning. Designed with the highest quality materials: an ultralight carbon fiber screed. Two oversized aluminum rollers, which coupled with ceramic bearings reduce the winding angle of the chain with minimal friction.

• In this version, the oversized Cage is only compatible with Shimano Ultegra R8100/Dura-Ace R9200 rear derailleurs.
• Specifications: weight: 68 g.
• Power gain: 4-5 W compared to a conventional screed.
• Color: Blue.