The SRAM XX1 Eagle XG-1299 sits at the top of SRAM's drivetrain hierarchy, delivering the ultimate in lightweight performance and wide-range Eagle gearing. Built around SRAM's X-Dome architecture, every gram has been engineered out without sacrificing the strength and precision demanded by the world's fastest riders.

• X-Dome architecture delivers exceptional strength-to-weight ratio — the same XD driver body used for SRAM 11-speed 10-42 cassettes
• Largest cog is aluminum for maximum weight savings at the top of the range
• Optimized tooth profiles improve both inboard and outboard shifting accuracy and chain retention
• Titanium Nitride surface treatment reduces friction, enhances wear resistance, and gives the cassette its signature Gold finish
• Meets durability requirements for E-MTB applications