Cable actuated hydraulic disc brake for road and CX True 'plug-and-play' compatibility with existing cable actuated systems Hydraulic reservoir automatically compensates for pad wear Utilizes TRP's semi-metallic pad compound Rotors, adapters, and flat mount mounting bolts sold separately Calipers are compatible with Shimano M525/M515 pads Rotors and adapters sold separately 160 mm rotor always recommended for front wheel