First Look: Shimano's New XTR is More Than Just 12-Speed
The M9100 group's massive overhaul has a new silent freehub interface, 3 cassettes, 2 rear derailleurs, 2 brake calipers, redesigned brake levers, bonded cranks, narrow-wide chainrings, upgraded pedals, a trail-adjustable top guide... oh yeah, and 12-speeds.