I have for sale a nearly new collection (front/rear) of Avid Elixir 9 Trail 4 piston hydraulic brakes. THese featured rotors. I mounted these on my bike and they were made use of around 3 times. Still in fantastic problem no scratching or chips at all. Pads in superb problem. THese are 4 piston brakes which implies they have double the power than regular 2 piston hyrdaulic brakes. THe levers are carbon which includes in the total light-weight, power of the brake. Don't hesitate to email or call with deals or questions. I made a decision to dismantle some bikes so i have bunches of other parts available for sale. Check them out!