Dual hydraulic controller for bicycle components

A dual hydraulic controller apparatus comprising:

• a housing;
• a first master cylinder disposed at the housing, wherein the first master cylinder includes:
• a first hydraulic chamber;
• a first fluid inlet for communicating hydraulic fluid into the first hydraulic chamber;
• a first fluid outlet displaced from the first fluid inlet for communicating hydraulic fluid out from the first hydraulic chamber;
• and
• a first piston disposed in the first hydraulic chamber for reciprocal movement therein;
• a first operating member coupled to the first piston for reciprocating the first piston;
• a second master cylinder disposed at the housing and coupled to the first master cylinder, wherein the second master cylinder includes:
• a second hydraulic chamber;
• a second fluid inlet for communicating hydraulic fluid into the second hydraulic chamber;
• a second fluid outlet displaced from the second fluid inlet for communicating hydraulic fluid out from the second hydraulic chamber;
• and
• a second piston disposed in the second hydraulic chamber for reciprocal movement therein;
• a second operating member coupled to the second piston for reciprocating the second piston;
• and
• a single reservoir for communicating hydraulic fluid both to the first fluid inlet and to the second fluid inlet, wherein the single reservoir surrounds the first hydraulic chamber and the second hydraulic chamber.