Shock absorber and saddle-type vehicle

A shock absorber which is provided between a vehicle body and a rear wheel of a saddle-type vehicle, the shock absorber comprising:

• a first damping force generating portion which is fixed to a first end portion of a cylinder in an axial direction thereof;
• and
• a second damping force generating portion which is disposed to be movable in the axial direction in the cylinder,
• wherein the cylinder includes an inner cylinder and an outer cylinder,
• wherein an upper end portion of the inner cylinder and an upper end portion of the outer cylinder are inserted into and held in a damper case,
• wherein one end of a first communication passage is formed to be opened in the damper case at a position facing an opening of the upper end portion of the inner cylinder, and the first communication passage allows an oil chamber at a first end portion side which is an inner space of the inner cylinder and an oil chamber of the first damping force generating portion to communicate with each other,
• wherein an opening portion is formed in the damper case, a second communication passage is formed in continuous communication with the opening portion, and the second communication passage allows an oil chamber of the first damping force generating portion and an annular flow path to communicate with each other, the oil chamber of the first damping force generating portion being different from the oil chamber at the first end portion side, the annular flow path being a flow path between the inner cylinder and the outer cylinder, and
• wherein the second damping force generating portion includes:
• a first flow path which passes through a piston in the axial direction of the piston partitioning a space inside the cylinder;
• a first valve which opens and closes the first flow path;
• a second flow path which is located at an outer side in a radial direction of the cylinder from the first flow path, passes through the piston in the axial direction, and has an inner diameter smaller than that of the first flow path;
• a second valve which opens and closes the second flow path;
• a third flow path which passes through a rod which holds the piston;
• a third valve which opens and closes the third flow path;
• a first adjustment unit which adjusts a force required to open the third valve;
• and
• a second adjustment unit which adjusts a force required to open the second valve.