SRAM Eagle GX LUNAR XD 12 Speed 4 Piece Groupset Kit

$429.90 USD $581.99 USD Save $152.09 USD

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Size: 10-50t
Choose from 10-50 or 10-52
SRAM GX Eagle 4 Piece Group Set:

SRAM Eagle GX XG-1275 B1 XD Driver Cassette:

The new 10-52 Eagle cassette for riders who prioritize all day function over anything else. With an expanded, 520-percent gear range giving riders more ability to spin and recover on the burliest climbs. Featuring FULL PIN™ technology that uses lightweight, precision engineered steel cogs permanently connected with high-strength stainless steel pins. An open design that aids in mud clearance, giving riders crisp shifting performance and longer component life.
  • CHOOSE: 10-50t OR 10-52t
  • SRAM's cassette manufacturing technology provides the greatest durability and lightest weight
  • 520-percent gear range utilizing the industry standard XD™ hub driver
  • Speeds: 12 Speed
  • Material: Stamped Steel
  • Color: Lunar and Black
  • *Fits SRAM XD Driver Hub Only (or equivalent)
  • Sprockets on spider: 12
  • Recommended Group: GX Eagle
  • Compatibility: All levels of Eagle drivetrain systems
  • Technology Highlights: Full Pin

Full Pin: FULL PIN technology uses eleven lightweight, stamped steel cogs held together with 123 high-strength stainless steel pins. The result: a cassette thats extremely light, durable and equipped with SRAMs super wide 10-42 gear range that is a perfect fit for any ride. The open design similar to our X-DOME cassette aids in mud clearance, giving you cleaner shifting performance and longer component life.

GX X-HORIZON B2 Rear Derailleur:

Riders want the derailleur to do its job shifting on command, whether under climbing load or the stage finish. The GX Eagle™ derailleur gets it done with an updated cage architecture that improves chain management. Refined to work with the new 10-52t cassettes, it’s also backwards compatible for the 10-50t versions. Giving riders choice, because that’s how it should be. Finished with the new GX Eagle™ master colorway – to compliment any cassette and chain colorway a rider wants from the Eagle™ Colorsystem. Further proof that the GX Eagle™ derailleur is there for one thing - to do the job.

  • Mounting system and re-positioned Cage Lock offer greater durability
  • Sealed cartridge pulley bearings
  • Backwards compatible, works with both 10-50t and new 10-52t cassettes
  • Updated cage architecture provides better chain retention and precise shifts
  • Speeds: 12 Speed
  • Cage Material: Aluminum
  • Pulley Bearings Material: Steel
  • Colors: Lunar
  • Compatibility: All levels of Eagle drive-train systems
  • Cage Size: Long
  • Max Tooth: 52t

Cage Lock: With CAGE LOCK technology in the rear derailleur, wheel removal and installation as well as chain installation becomes faster and simpler. Just pushing the cage forward to create slack and lock it into place.
ROLLER BEARING CLUTCH: ROLLER BEARING CLUTCH rear derailleurs deliver maximum drivetrain stability even through the most punishing terrain. With ROLLER BEARING CLUTCH technology, derailleur bounce and chain slap are eliminated without sacrificing precision.
X-ACTUATION: Developed specifically for SRAM 1X, X-ACTUATION keeps shifting sharp and consistent across the entire cassette.


Of all the components that make up a mountain bike drivetrain, the shifter doesn’t exactly get a lot of spotlight time. But as the rider’s literal command and control center, the GX Eagle™ shifter is more than worthy of recognition. With intuitive thumb actuated triggers, the positive feel gives the right rider input to make shifts crisp and discernible every time. What’s more, its already legendary reliability continues for all-day epics, and all-time experiences. Plus, it features an aluminum trigger that’s ready for inevitable punishment, and MatchMaker™X compatibility. Precise and durable, it’s the hard-working, no-compromise shifter keeping riders in the right gear, every ride.

  • Speeds: 12 Speed
  • Compatibility: All levels of Eagle drivetrain systems
  • Recommended Group: GX Eagle
  • Material: Forged aluminum trigger
  • Color: Lunar
  • Gear Indication: No
  • Includes Discrete Clamp and 2200mm Cable

X-ACTUATION: Developed specifically for SRAM 1x, X-ACTUATION keeps shifting sharp and consistent across the entire cassette.
Zero Loss: ZeroLoss simply means, well, zero loss when you push on the lever, for an upshift or down shift, the cable is engaged instantly zero loss of movement. There is no middle-ground where you're waiting for the shift to come. Gear changes are instant and precise.

SRAM Eagle GX Chain:

The GX Eagle chain is designed with SRAMs Eagle geometry, the GX Eagle chain features solid pin construction, Eagle PowerLock and smooth, efficient shifting that you can count on every time out.
  • Speeds: 12 Speed
  • Closing Link: PowerLock
  • Outer Plate: Silver
  • Inner Plate: Black
  • Pin Treatment: Chrome
  • Advertised Weight ~ 258g (114 links)
  • Material: Outer link finish Nickel
  • Rivet Type: Solid pin
  • Recommended Group: GX Eagle
  • Compatibility: All levles of Eagle drivetrain systems
  • Technology Highlights: PowerLock, Flow Link

Customer Reviews

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Andrew Callaway