The 11-Speed Chorus rear derailleur has a parallelogram of new design with an oversize carbon fibre outer plate. This is the fulcrum of the 11-speed systems. The 11-speed rear derailleur has a forged aluminium upper body which works on an enveloping and oversized carbon fibre outer plate. The new form confers torsional rigidity which is 150% greater than the old design and contributes to the construction of a parallelogram with absolute operating precision. The cage pulleys are now made of a lighter material and reduce vibrations.
