Shimano BR-U8000 CUES Post Mount Disc Brake CalliperCUES range of components for mid grade riding styles offers simplified compatibility, versatility, and durability. 2 Piston post mount calliper. For use with mineral oil which is non corrosive and less hazardous than conventional hydraulic fluid. The one way internal fluid circuit makes bleeding easy, while great piston retraction increases pad to rotor clearance. Shim less mounting bracket allows for quick installation and set up. Compatible with