Sram xx1 eagle bb30 12 speed chainsettrue competitors are always looking for a performance advantage a relentless pursuit of equipment that is lighter stiffer and stronger to create the best drivetrain possible sram started with a completely reengineered chainset design srams all new xx1 eagle chainset is the lightest stiffest and strongest on the market a special hollow internal architecture combined with their proprietary carbon tuned lay up allows them to build a lightweight and u