The X01 Eagle drivetrain provides uncompromising performance for enduro racers and aggressive trail riders. X01 Eagle takes 1x drivetrains and increases their wear life, toughness, precision, smooth and silent operation. And the 10 - 50 tooth 12-speed Eagle cassette provides a range of gears that gives you the freedom to enjoy the benefit of 1x in any terrain, any location and at any speed.Eagle is a complete drivetrain system that was developed to be an integrated high-performance ecosystemThe engineering and testing that went into the development provide for maximum performance, safety, and long-term durability to ensure a great ride experienceSRAM guarantees this performance when Eagle drivetrains are used as a complete ecosystemBottom bracket sold separatelySpecsRings: 32Length: 170Cassette Cogs: 10-12-14-16-18-21-24-28-32-36-42-50In The BoxSRAM X01 Eagle Sil 126 Links 12-SpdSRAM X01 Eagle X01P 170 32T XSync2 DMSRAM X01 Eagle Cassette 10-50 12 SpeedSRAM X01 Eagle Trigger Shifter 12spdSRAM X01 Eagle Rear Derailleur 12 SpeedSRAM Eagle RD Chain Gap Adjustment Gauge