Top of the range high performance dura ace low profile hydraulic road disc brake for efficient braking in all conditions key features front wheel use for flat mount forks with adapter to flip between 140 and 160 mm oversized 22mm ceramic pistons optimized for heat insulation lightweight and stiffness opposed 2 piston design reduces leading effect and optimal pad wear increases braking control increased pad to rotor clearance reduces the chance of rotor drag direct flat mount and open