Admittedly, this X9 2x10 Low Clamp Front Derailleur looks quite similar to its X0 big brother. The difference lies in the material choices used to build each one. Where X0 uses aluminum for the linkage parts, X9 uses steel. The net result is a weight penalty of a few grams, but you'll save money. And with SRAM X9's reputation for durability and affordability, you know you'll get something that works well and will last a long time. The X9 2x10 Front Derailleur is made specifically for 2x10 drivetrain systems as the shape and swing of the cage are dialed in for the fastest and most consistent shifts possible across a double chainring setup. 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. It's also designed to work best in conjunction with SRAM's X Glide chainrings. The SRAM X9 2x10 Low Clamp Front Derailleur has a multi clamp and will work with 31. 8 and 34. 9mm seat tubes. Select Top or Bottom pull cable routing.