OE Replacement for XTR 960 Crankset Outer Ring. As with all XTR rings - it features precise CNC machining from 7075 series alloy, which is heat treated and anodized. teeth are profiled and the medial side is ramped for elevating the chain onto the ring. Light, alloy pick-up pins are inserted for assisting the chain during shifts and keeping it from dropping off and between rings during shifts. In a word - brilliant.