Microspline

Brakes
A Summer Spent Pedaling Aboard Shimano XTR 12-Speed Group Set [Review]
  7
Drivetrain
In For Test: Shimano XTR 12-Speed 9100/9120 Groupset, Before the Abuse
  2
Brakes
Shimano Announces More Affordable 12-speed Compatible Hubs, 4-Piston Brakes, Rotor
  2