The Sram top Pull, X0 2x10 High Clamp Compact 39t Max Front Derailleur is specifically designed to work in conjunction with SRAM's 2x10 cranksets. As such, it's made to handle up to a 15 tooth differential between the big and little rings. Its cage is shorter and narrower than a triple specific changer. This is great news for those who fear clearance between their rear suspension and their front derailleur. The aluminum links that shape the swing of the derailleur cage have widely spaced pivots for stiffness. This rigidity inherent in the parallelogram is part of what makes X0 front shifting so quick and efficient. The derailleur cage is made from steel for maximum durability and is shaped for optimum performance with their X Glide chainrings. The Sram X0 2x10 High Clamp Compact 39t Max Front Derailleur is a multi clamp design and will work with either 34. 9mm or 31. 8mmm seat tube diameters and is configured for top pull cable routing.