Bicycle operating device

A bicycle operating device comprising:

• a base member comprising:
• a first end portion;
• a second end portion opposite to the first end portion;
• and
• a gripping portion provided between the first end portion and the second end portion;
• an operating member pivotally coupled to the base member about a pivot axis;
• and
• a hydraulic unit provided at the base member, the hydraulic unit comprising:
• a hydraulic cylinder including a cylinder bore defining a center axis, and
• a piston arranged in the cylinder bore and movable relative to the hydraulic cylinder along the center axis,
• the pivot axis being arranged below the center axis in a mounting state where the base member is mounted to a handlebar, the gripping portion being arranged about the center axis in the mounting state,
• the piston being closer to the first end portion than the pivot axis, and
• the cylinder bore arranged in a lower portion of the base member between the first end portion and the pivot axis.

A bicycle operating device comprising:

• a base member configured to be mounted to a handlebar, the base member including a through-hole and an arrangement portion;
• an operating member movably mounted to the base member from a rest position toward an operated position;
• and
• a hydraulic unit provided at one of the base member and the operating member, the hydraulic unit comprising:
• a hydraulic cylinder including a cylinder bore coupled to the through-hole;
• and
• a piston arranged in the cylinder bore, the piston being configured to be pulled from an initial position to an actuated position in response to a movement of the operating member from the rest position toward the operated position to supply a hydraulic pressure toward at least one bicycle component;
• a piston rod coupled to the piston and extending through the through-hole;
• and
• a seal member arranged on the arrangement portion to be in direct contact with the piston rod,
• a first distance defined between an end of the cylinder bore and an end of the arrangement portion being equal to or longer than 1 mm.

A bicycle operating device comprising:

• a base member configured to be mounted to a handlebar, the base member including a through-hole and an arrangement portion;
• an operating member movably mounted to the base member from a rest position toward an operated position;
• and
• a hydraulic unit provided at one of the base member and the operating member, the hydraulic unit comprising:
• a hydraulic cylinder including a cylinder bore coupled to the through-hole;
• and
• a piston arranged in the cylinder bore, the piston being configured to be pulled from an initial position to an actuated position in response to a movement of the operating member from the rest position toward the operated position to supply a hydraulic pressure toward at least one bicycle component;
• a piston rod coupled to the piston and extending through the through-hole;
• and
• a seal member arranged on the arrangement portion to be in direct contact with the piston rod,
• a first distance defined between an end of the cylinder bore and an end of the arrangement portion being equal to or longer than 10% of a second distance defined between an end of the piston and the end of the cylinder bore in a state where the piston is at the initial position.