A shock absorber, which is particularly applicable to bicycles, includes a mount body, a first cap portion, a second cap portion, and a fluid cylinder. The fiber reinforced, high-strength structural panels form the walls, ceiling, roof, soffit, and eave of the structure. Its reflected light is incident again on the light guide member and the resulting totally reflected light is transmitted to the observer’s side at places other than the slits, while the observer’s field of view is not obstructed at the slit portions. The phase winding of the stator may be configured to have a single phase.