Light enough for XC and powerful enough for freeriders, Avid's Elixir R provides world-class control and power. Avid's Taperbore technology and Power Reserve Geometry deliver great modulation and pinpoint stops. Increased power comes courtesy of a super-stiff, 2-piece caliper that contains larger pistons and DOT 5.1 fluid for better heat resistance to prevent brake fade. This fine brake also uses a tool-free reach adjustment that allows you to set your lever position for a superb bar feel. Plus, the Elixir's unique integrated, in-line reservoir provides a major weight reduction and a sleek look. It even comes complete with Avid's CleanSweep rotor.