Shimano’s top tier flagship groupset, XTR, has always been very high on the wish list for the ultimate trail bike build. The chainset is the very heart of the transmission and the XTR crank has appeared in every one of the Dirt 100 listings, from 2009 to this latest 2017 selection.
There has been plenty of competition and with the evolution of single chainring transmissions you could easily point a finger at Shimano for being a touch late with this development.