About SRAM GX DH 7 Speed Rear Derailleur
SRAM understand that the gnarly line requires a lot more focus than a lap of the supermarket. That’s why they packed the GX DH 1x X-HORIZON™ rear derailleur with World Championship-winning features, and gave it a price tag that speaks more to the Wednesday Night Championships. This is a DH derailleur that is easier to shift, is incredibly precise and keeps the unwanted noise of chain slap to a minimum, so you can concentrate on the sweet feeling of nailing your line. GX DH — Get Some.

Features
X-ACTUATION™ for precise and dependable 7-speed performance

Fully compatible with the SRAM X01 DH drivetrain

X-HORIZON™ design that reduces shift force, ghost shifting and cage slap

12-tooth X-SYNC™ pulley wheels

Technology
CAGE LOCK: With CAGE LOCK technology in the rear derailleur, wheel removal and installation—as well as chain installation—becomes faster and simpler. Just push the cage forward to create slack and lock it into place.

ROLLER BEARING CLUTCH: ROLLER BEARING CLUTCH technology eliminates derailleur bounce and chain slap without sacrificing precision.

X-ACTUATION: Developed specifically for SRAM 1x, X-ACTUATION keeps shifting sharp and consistent across the entire cassette.

X-HORIZON: This rear derailleur’s “straight parallelogram” design limits all movement to the horizontal axis, which makes ghost shifting impossible while also reducing shift force. For quicker, more exact shifting, the large upper pulley offset design maintains a constant chain gap across all gears.

X-SYNC: SRAM X-SYNC 1x chainrings provide the highest level of performance and durability. The SRAM X-SYNC tall square teeth edges engage the chain earlier than traditional triangle shaped teeth. The sharp and narrow tooth profile, as well as rounded chamfer edges, help manage a deflected chain. To provide the best possible performance in muddy conditions, the X-SYNC chainrings have been designed with mud-clearing recesses for the inner chain links and rollers. Engineered in Germany, X-SYNC rings are an integral part of the SRAM 1x drivetrain. Accept no imitation.

Specifications
Speed (RD): 7s

Cable Pull Ratio: Exact actuation

Cage (RD): Medium

Max Tooth: 28

Colour (RD): Black

Pulley Bearings Material: Steel

Cage Material (RD): Aluminum

Model ID: RD-GX-1DH-A3

About SRAM
Founded in 1987, SRAM (an acronym of the 3 founders names, Scott, Ray and Sam) is a privately owned bicycle component manufacturer located in Chicago. They're known for developing many of the inovative technologies used in bikes today including ETAP wireless electric shifting, Grip Shift, dedicated single chain ring drivetrains, narrow wide chainrings and more. Sram also own bicycle component brands Rockshox, Quarq, Zipp and Truvativ.