Comprising of a 6000 series aluminium crank arm & tough alloy SRAM X-Glide chainrings, this excellent chainset is at its very best when used with a wide range 10-42 cassette & GX 2x rear derailleur. Digging deep to push you all over the mountain, this double crankset, each chainring has been redesigned at the point where the chain engages with the rings for a firmer riding hold & easier release as it moves between the two. With the chainring pick-up rivets aligned to the chain pivot pin, you can double shift as much as you like, making for an efficient & dependable crankset to take you through the toughest of routes with ease.