NOVA Ride Ultegra rear derailler / Dura-Ace 12s

Composed of a carbon cage and 2 aluminum rollers 7075 (14 and 17 teeth) with completely sealed ceramic bearings. In this version, the oversized cage is compatible only with the Shimano Ultegra R8100/Dura-Ace R9200 rear deraillers. The Nova Carbone ceramic gear cage improves the fluidity of your transmission, allowing a power gain to satisfy the most demanding. Designed with the highest quality materials: a screed in ultralight carbon fiber. Two oversized aluminum rollers, which coupled with ceramic bearings reduce L'chain winding angle with minimal friction.

Characteristics:

• Compatible only with the Shimano Ultegra R8100/Dura-Ace R9200 rear deraillers.
• Weight: 68g.
• Power gain: 4-5 W compared to a conventional screed.