*Not compatible with Quarq Powermeter spiders.. ** ALL DUB CRANKSETS REQUIRE A DUB BOTTOM BRACKET **. Eagle represents Sram`s newest 1x drivetrain technologies. DUB technology delivers the lightest stiffest strongest crankset available. Eagle is a lighter tougher quieter more durable and more precise drivetrains. Eagle features all-new 1x components engineered for even greater durability and performance. Eagle technology allows an expanded optimum 500-percent gear range - a 20-percent increase over our other 1x. All-new Sram Carbon Tuned crank technology provides extreme stiffness and light weight. All-new chainring technology is designed specifically for Eagle chains and drivetrains. The X-SYNC 2 chainring provides significantly quieter performance with better mud clearing and extraordinary durability. *Not compatible with Quarq Powermeter spiders.