The shimano deore m615 brake lever post mount calliper is a fully cled hydraulic disc brake with an easily adaptable post style calliper the front fully bled lever and calliper doesn39t come with adapters or rotors so you can freely customise the brakes to suit your bike this brake is compatible with the revolutionary centre lock rotor system which fits easily into centre lock compatible hubs alternatively you can use conventional 6 bolt rotors in a choice of 160mm 180mm and 203mm