- For Sram XX, X0, X9, X7 double These chainrings are compatible with range of double MTB chainsets, including SRAM 10 speed of 2010 (XX) and 2011 (XX, X0, X9, X7). Made of high quality 7075 T6 aluminium for a maximum strength. * Inner sizes : 80mm PCD, 10/11x, 26, 28 and 30 teeth * Outer sizes : 120mm PCD 10x Specific 38, 40, 42 and 44 teeth * 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
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