SRAM's Eagle drivetrain system sets a new benchmark for range and effectiveness with a 1x drivetrain due to an amazing 10-50 12-speed cassette. The XX1 Eagle is top of the line with improvements across the board. The XX1 Eagle BB30 Crankset features new SRAM carbon construction for lighter weight with durability and stiffness that erases the need for XC and Trail versions. This crankset includes the 12-speed compatible Direct Mount X-SYNC™ 2 chainring for frames with a standard 49mm chainline. SRAM's goals with XX1 Eagle was to build an XC drivetrain with a combination of simple functionality, light weight, highly efficient and quiet operation and long lasting performance. Carrying over the concepts that have made SRAM's mountain drivetrains so popular, such as the X-ACTUATION™ trigger shifter design, 1:1 cable pull ratio, and X-HORIZON 1x optimized rear derailleur system, you get tried and true technology that has been refined and maximized for XX1 Eagle.

The BB30 crank axle and bottom bracket system is known to be light, stiff, with lower friction and more balanced power transfer. Frames with PF30 shells are strong and light as well. Combined with the Eagle system and Direct Mount chainring, the SRAM XX1 Eagle BB30 Crankset is an ideal set-up. Thousands of hours of wear evaluation from 11-speed 1x chainrings helped SRAM to evolve and re-engineer the X-Sync tooth profiling, and this second generation has some serious new shaping and teeth that hold the newly designed Eagle chain perfectly, at any and all angles, in any ring and cog combination. All Eagle chainrings install with SRAM's Direct Mount system, which makes installing or changing rings simple and fast, and delivers an incredibly stout interface that is carried through the machining of the entire ring. This particular XX1 Eagle 12-Speed BB30 Crankset comes with the standard 49mm chainline version of the ring. Please keep in mind that with SRAM, Boost spacing is created with a 3mm offset built into the ring itself. If you need to replace for the 49mm chainline, you buy the standard version, and if you get a new frame with Boost spacing all you have to do is get the Boost 52mm chainline ring.

The 30mm crank axle fits all BB30 mountain bottom bracket cups, of which SRAM offers several options. In order to build the carbon crank arm assembly to receive the axle within the direct mount zone of the driveside arm, and still meet the lightweight, stiff and efficient requirements, SRAM employed a new internal hollow core carbon architecture and overall carbon design referred to as Carbon Tuned. A new carbon lay-up was devised to find the right balance, and the internal structure augments the stiffness of the arm shape, as well as adding durability. SRAM is also providing injection molded guards that slip over the end of the crank arm for impact protection. Once you install your pedal, the guard is secure in place and actually can handle serious abuse. This is no rubber boot.

Every aspect of the SRAM XX1 Eagle 12-Speed BB30 Crankset has extraordinary finish and quality construction you'd expect in SRAM's top line cranksets. Performance is flawless, and regular SRAM 1x riders will be surprised at how quietly the new ring and chain function, with zero-drop reliability. Running a BB30 frameset with 135 or 142mm rear spacing? Ready for a 32t ring and 10-50 cassette drivetrain? We have the ultimate crankset for you. XX1 Eagle soars above expectations. Will you take flight with it?