High-quality Sram Gx RD-GX-1-B2 12-speed Lunar rear derailleur. Maximum rear sprocket size 52t
X-Horizon prevents all horizontal movement in the derailleur, thus preventing ghost shifting and keeping shifting incredibly precise and fast.
The Roller Bearing Clutch keeps the derailleur and chain stable in challenging terrain, thus preventing chain movement. It keeps the bike silent and the shifting lightning fast.
With Cage Lock, you can lock the derailleur, making it easier to remove the wheel or change the chain.