Shimano Dura-Ace R9150 Di2 11-Speed SS Road Rear Derailleur
The Dura Ace 9150 Di2 rear derailleur from shimano. The Dura Ace 9150 features sychronised shift that select the most appopriate gear ratio whilst the electronic cables elimianate poor shifting caused by cable stretch and dirt. The Derailluer contains a saver function in the case of a heavy impact will protect the internal.The Dura Ace 9150 Di2 rear derailleur has a carbon cage and pulley plates to reduce weight plus improving stiffness, with self-lubricating pivot bushings. The front derailleur has been redesigned to eliminate outer trim and is more resistant to chain wear due to the forged alloy chain cage.
The Dura Ace 9150 rear weighs only 204 grams.