Elite Shifting, Iconic Style & Lightweight Power
The Sram XG-1299 Eagle XX1 Copper cassette – 12v is the pinnacle of SRAM’s drivetrain technology, delivering unmatched shifting precision, race-ready performance, and a head-turning copper finish. Designed for riders who demand the very best, the Sram XG-1299 Eagle XX1 Copper cassette – 12v offers smooth, crisp gear transitions with incredible lightweight durability for XC racing, trail riding, and enduro performance.
Premium 12-Speed Range for Any Terrain
The Sram XG-1299 Eagle XX1 Copper cassette – 12v delivers a massive 10–52T range, giving riders effortless climbing gears and high-speed top-end performance. Whether tackling steep ascents or sprinting down fast descents, this cassette provides the perfect gear for every section of the trail.
CNC-Machined X-Dome Construction for Maximum Strength
Crafted using SRAM’s X-Dome technology, the Sram XG-1299 Eagle XX1 Copper cassette – 12v combines lightweight machining with high structural rigidity. This design sheds unnecessary grams while maintaining exceptional durability, even under aggressive power output. The open structure also improves mud clearance and reduces wear.
Iconic Copper Finish With World-Class Shifting
The Sram XG-1299 Eagle XX1 Copper cassette – 12v stands out with its bold, premium copper colorway—instantly recognizable and built to last. Paired with SRAM’s precise shifting design, it delivers buttery-smooth transitions across all 12 gears, making every ride feel seamless and efficient.
| Specification | Detail |
|---|---|
| Drivetrain Speed | 12-speed |
| Gear Range | 10-52 teeth rear cassette (10-12-14-16-18-21-24-28-32-36-42-52) — 520% gear range |
| Cog Material | Steel for cogs 1–11; largest cog (52T) is aluminum for weight savings |
| Freehub / Driver Body Compatibility | SRAM XD-driver body (must be used with XD freehub) |
| Cassette Technology | X-DOME architecture — lightweight, strong, and designed for durability and mud-clearance |
| Intended Setup | 1× drivetrain (single chainring upfront) — ideal for modern MTB setups (trail, all-mountain, enduro, XC) |
| Shift Performance | Uses SRAM’s optimized 12-speed shifting technologies (Eagle drivetrain) for smooth, precise shifting under load |
| Finish/Color Option | Copper finish (plus other color options: Gold, Black, Rainbow) via Eagle Colorsystem |
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