Trp spyre slc mechanical 2 piston disc brakethe spyre slc is a mechanical disc brake that offers superior performance withincrediblyeasy setup this is a dual sidedmechanical disc brake caliper where both pads actuate providing even andpreciseclamping force this translates into even pad and rotor wear trp have added a simple cable barrel adjuster so the pads can be easily adjusted tool free no longer is there the drag of the fixed side adding uneven wear or worse warping your rotors a