SRAM's Latest Drivetrain Revolutionizes Mountain Biking.

SRAM has launched its new Eagle Transmission, a 12-speed electronic drivetrain that is free of wires, derailleur hangers, limit screws, or B-tension adjustments. The XO drivetrain has been tested over 1,000 miles and 175,000 vertical feet of climbing over the course of 65 rides. The new aluminum crankset is the most eye-catching part of the new groupset, and the cassette maintains the 10-52 tooth gear spread found on SRAM's Eagle drivetrains. The XO chain has a black finish that SRAM calls 'Dark Polar', and it has a PVD coating to ward off corrosion and improve its lifespan. The XO groupset is priced at $1,599.