SRAM Cassette XG-1299 Eagle 12 Speed: COPPER 10-52T

SRAM XG-1299 Eagle 12-Speed Cassette – Copper, 10–52T

The XG-1299 is SRAM’s flagship 12-speed Eagle cassette, built around their X-DOME architecture — a construction method that independent tests have identified as producing some of the strongest cassettes available. If you’re running a 1x drivetrain on trail, enduro, or eMTB, this is the top of the Eagle range.

What It Does

The 10–52T range delivers a wide gear spread suited to steep climbs and fast descents without a front derailleur. The 12-speed layout keeps steps between gears manageable across the full range, and SRAM’s Eagle shifting is engineered for reliable performance both inboard and outboard, with improved chain retention over earlier Eagle generations.

Technical Insight

• Speeds: 12-speed Eagle
• Range: 10–52T
• Architecture: X-DOME construction for rigidity and durability
• Driver body: Requires SRAM XD Driver Body — not compatible with standard HG freehub bodies
• Part number: FW8107000
• Finish: Copper

Compatibility

This cassette is designed exclusively for use with the SRAM XD Driver Body. Check your rear hub before ordering. It is compatible with the full SRAM Eagle 12-speed drivetrain ecosystem.

Why Torque Collective Stock This

The XG-1299 sits at the top of the Eagle cassette range and is a common choice for riders building or upgrading a serious 1x drivetrain on either a mountain bike or eMTB. The X-DOME construction and wide 10–52T range make it a practical, high-durability option for the varied and demanding terrain ridden around Essex and beyond. We stock it as a go-to cassette for Eagle drivetrain builds and service replacements.