
                                               Performance without compromise. Dura-Ace rear derailleur with lightweight carbon cage & wide link design gives quick accurate shifts. Key 
 Features: Full unidirectional carbon fibre inner & outer pulley plates enhance rigidity & significantly reduce weight (not the 2k weave as shown in the picture). High tolerance cold forged aluminium link plates & body construction provide for extremely light weight,  strength & durability. High rigidity wide outer link plates & pulley body to increase pivot joint rigidity. Sealed pulley bearings reduce friction & rotate silky smooth,  increasing efficiently. Four self-lubricating micro-machined fluorine-coated link pivot bushings provide low-friction shifting. Pulleys are made from tough Du Pont Zytel for longer life & less chain noise. With a total capacity of 33 tooth,  it is able to operate with wide gear ratios up to a 28 tooth cassette sprocket. Hard wearing Dura-Ace finish & graphics for long lasting good looks. Fully 10-speed compatible. Weight: 166g (Manufacturer claimed).