*Not compatible with Quarq Powermeter spiders.. ** ALL DUB CRANKSETS REQUIRE A DUB BOTTOM BRACKET **. The new X01 Eagle is Sram`s best toughest and most aggressive Trail and Enduro crankset thanks to DUB technology which features a better-engineered bottom bracket and a new spindle design. Eagle represents Sram`s newest 1x drivetrain technologies. DUB technology delivers the strongest stiffest lightest crankset available. Eagle has a significant weight advantage over other drivetrains - X01 Eagle weighs up to 250 grams less than 2x drivetrains with similar gear range. Eagle technology allows an expanded optimum 500-percent gear range - a 20-percent increase over our other 1x drivetrains. 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.