New Shimano XT Crankset 11 Speed 2016 In stock, it comes as standard single ring narrow wide, pretty cool. See the review below from bike radar.
Just like XTR, XT M8000 will continue to allow options, with 1×11, 2×11 and 3×11 drivetrain configurations available. The standard crankset is the same for both 1x and 2x setups, although it’s to be confirmed if the 3x crank is different again.
Available in 30, 32 or 34T sizes, the 1×11 chainrings will use Shimano’s ‘Dynamic Chain Engagement’. This is a slightly hooked and taller tooth profile instead of the more common narrow-wide designs from other companies.
Double ring options are 34-24T, 36-26T and 38-28T. There’ll be just one triple option available, with 22-32-40T gearing, which is insanely low combined with the 11-40T cassette.
Middle and outer chainrings, including the one for 1×11 configurations, will feature a carbon construction with steel teeth for increased durability.
New threaded and press-fit bottom brackets are said to take a cue from XTR and Dura-ace designs with smaller bearings and improved seals that reduce drag, drop weight and improve durability.