For Sram XX, X0, X9, X7 doubleThese chainrings are compatible with range of double MTB chainsets SRAM 10 speed of 2010 (XX) and 2011 (XX, X0, X9, X7).Made of high quality 7075 T6 aluminium for a maximum strength.Key Features:Inner sizes : 26, 28 and 30 teeth with 80mm PCD.,Outer sizes : 38, 40, 42 and 44 teeth with 120mm PCD.,Threaded outer chainrings for fitting without nuts.,Lighter than originals.,Colour : Matt black,Weight for the kit 26/40 teeth 91g, kit 28/42 teeth 108g.