Abstract: There is disclosed a vehicle air suspension of the trailing arm type in which a system for lifting one or more road wheels whose load-bearing capacity is not required comprises a cradle having a platform member on which is supported an air bag. The air bag is disposed, on inflation, to act on a longitudinal member of the suspension so as to urge that member, and a road wheel attached thereto, upwardly. The cradle has a pair of arms which pass to opposite sides of the longitudinal member. Embodiments are disclosed in which the arms are adapted to be secured to a suspension damper mounting, to a pivot of the longitudinal member, or to a suspension bracket of the vehicle.