The sram x9 3x10 high clamp front derailleur shares the same design and principles as sram39s xo only it forgoes aluminum in order to keep its price lower in place of the aluminum sram opted for steel which adds a little weight but also durability the cage is specifically designed to work in conjunction with sram39s 2x10 cranksets and x glide chainrings as such it39s designed to handle up to a 15 tooth differential between the big and little rings the steel links that shape the