The SRAM X0 2x10 Low Direct Mount S3 Front Derailleur is specifically designed to work in conjunction with SRAM's 2x10 cranksets. The cage itself is shorter and narrower than a triple specific changer great news for modern 29er frames where clearance between rear suspension and front derailleurs is paramount. SRAM's S3 designation means that this front derailleur is compatible with the current crop of E2 style direct mounts found on frames from Yeti, Niner, and Pivot. It's made to handle up to a 15 tooth differential between the big and little chainrings. The aluminum links that shape the swing of the derailleur cage have widely spaced pivots for an incredible level of stiffness. The rigidity inherent in the derailleur's parallelogram is part of what makes X0's front shifting so quick and efficient. The derailleur cage is made from steel for maximum durability, and it's also shaped for an optimized working relationship with SRAM's X Glide chainrings. The SRAM X0 2x10 Low Direct Mount S3 Front Derailleur is available as either top or bottom pull versions for 39 or 42 tooth configurations. For mounting, it bolts straight into a Shimano style Direct Mount on your frame.