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The SRAM X01 Eagle drivetrain signals an exciting new era of freedom and the next level of uncompromising performance for enduro racers and aggressive trail riders. Sram's X01 Eagle took everything you love about their 1x drivetrains and increased wear life, toughness, precision, and the smooth, silent operation. The 10- to 50-tooth, 12-speed, Eagle cassette offers a range of gears that gives you the freedom to enjoy the benefit of 1x in any terrain, any location and at any speed. X01 Eagle™ is drivetrain freedom—how you exploit it is up to you.