SRAM GX Type 2.1 Rear Derailleur 1x11 Speed Long Cage Black XSync 2020 Ships within Australia In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button... SRAM GX Type 2.1 Rear Derailleur 1x11 Speed Long Cage Black XSync 2020 Ships within Australia In stock. Available via Click and Collect or Buy Online Share Loading Facebook Like button...