SRAM XG-1299 XX1 Eagle 12-Speed Cassette (10-50T)

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Take a quick look at the new X-DOME™ Eagle™ cassette. The last dangling shred of an argument in favor of a mountain bike front derailleur is now officially dead. Designed for use with our proven, reliable XD™ driver body, this 12-speed, 10- to 50-tooth cassette offers an optimal 500-percent gear range at a considerably lighter weight than 2x systems. It carries with it the X-DOME™ architecture, which, independent tests have concluded, yields the strongest cassettes on the market. New shifting characteristics improve both, inboard and outboard shifting, as well as chain retention.


  • SRAM’s cassette manufacturing technology provides the greatest durability and lightest weight
  • All-new shifting features create a smoother, quieter system with enhanced inboard and outboard shift performance
  • XD™ driver body compatible
  • 10, 12, 14, 16, 18, 21, 24, 28, 32, 36, 42, 50

X-DOME technology creates an incredibly lightweight, precise and strong cassette. The open design aids in mud clearance, giving you cleaner shifting performance and longer component life.

X-Glide 2:

X-GLIDE™ 2 is next generation of SRAM X-GLIDE™ technology optimized for the EAGLE™ 12-speed cassette. It provides quick, precise, power-on shifting performance throughout the gear range, and increases chain retention on larger cogs.

XD Driver Body:

XD is a new cassette driver body design that allows the use of a 10 tooth small cog and provides an improved interface with the cassette.

Technology Highlight(s):
X-DOME™, XD™ driver body, X-GLIDE™ 2
Material: Same as XX1, machined cromoly 11t cog cluster with aluminum 50t cog
Gear Ratios: 10-50t
Speeds: 12
Colors: Gold
Recommended Chain: Eagle™ chain
Recommended Group: XX1 Eagle™
Cogs: 10-50t: 10t, 12t, 14t, 16t, 18t, 21t, 24t, 28t, 32t, 36t, 42t, 50t
Other: Cogs on cluster: 11
Compatibility: 12-speed XD™ driver body compatible

This product was added to our catalog on July 21, 2016.