Campagnolo record 12 speed rear derailleura superbly light and high performing derailleur that's engineered for effortless shifting, so you can reach your peak faster.lightweight and highly durable derailleurthe record rear derailleur 12 speed from campagnolo is the ideal choice of upgrade for getting the maximum shifting experience from your bike. Made from carbon fibre reinforced technopolymer which is not only super lightweight but also highly robust for years of long lasting use.designed with the thrill seekers and cycling enthusiasts in mind, the record rear derailleur increases your speed, performance and shifting accuracy. The cage has been specially constructed to work alongside sprockets from 11 to 32 teeth which allow a single version to be maintained for all available sprocket sets. Thanks to its 3d embrace technology which creates a double effect, your chain can maintain optimum traction every time.when riding over harsh roads, the derailleur maintains constant accuracy thanks to the spring between the upper body and the joint which absorbs vibrations, enabling you to have a smooth riding experience.the record rear derailleur 12 speed from campagnolo is the ideal choice for keeping you at the top of your game, ride after ride.features material carbon fibre reinforced technopolymer constant accuracy speed 12 speed the 12 tooth wheels mean smoother chain movement 3d embrace technology ability to adjust the initial derailleur position to adapt to each sprocket set easy wheel replacement weight 0.216kg buy campagnolo components from chain reaction cycles, the world's largest online bike store.