Leveraging the legendary history of SRAM shifting, the GX Type 2.1 10-speed rear derailleur provides incredible shifting speed and precision. This SRAM rear derailleur is crafted from lightweight, stiff and durable aluminium, resulting in a feather-light weight with bombproof durability. Kitted out with Exact-Actuation and Roller Bearing Clutch technology, this derailleur produces super-fast exact shifting at all times. The derailleur has been designed with a focused chassis design for all conditions and usage, ensuring that your shifting never lets you down, even if you throw it down a rocky mountainside. The Cage Lock feature takes the hassle out of wheel removal and installation, making your adjustments a breeze.