Vehicle suspension

A vehicle suspension comprising one end, another end, a spring, and a preload adjusting mechanism, the other end being configured to make a stroke relative to the one end, the spring being compressed between the one end and the other end, the preload adjusting mechanism being capable of adjusting a preload of the spring, the preload adjusting mechanism including a cam receiving part and an adjuster part, the cam receiving part being provided on an outer periphery of the one end, the adjuster part being rotatably fitted to the outer periphery of the one end, the adjuster part including a spring receiving part and a cam part, the spring receiving part having a ring-like shape and being configured to receive one end of the spring, the cam part being provided with a plurality of cam surfaces extending from the spring receiving part toward the cam receiving part, the preload being adjusted by selective engagement of the cam surfaces with the cam receiving part by rotation of the adjuster part, the cam surfaces having different heights, wherein

• the adjuster part includes a vertical wall part and an engaging part, the vertical wall part being erected in an axial direction of the spring from the spring receiving part, a tool to rotate the adjuster part being to be engaged with the engaging part, and
• the engaging part includes a first engaging part and a second engaging part, the first engaging part being formed by a gap between the plurality of vertical wall parts disposed separately from each other in a circumferential direction of the adjuster part, the second engaging part being formed by a hole penetrating the vertical wall part.