To read why sram eagle is up there with bike radar39s most wanted click here to read our staff blog on the sram eagle groupset click here to create the best drivetrain possible we started with a completely reengineered crankset design our all new xx1 eagle crankset is the lightest stiffest and strongest on the market a special hollow internal architecture combined with our proprietary carbon tuned lay up allows us to build a lightweight and ultra energy efficient crankset perfectly