Abstract: A lift axle is pivotally mounted to the frame of a vehicle for selectively providing additional flotation for the vehicle. A pair of frame brackets are secured to the frame members of the vehicle and have horizontally disposed mounting plate portions adjacent the lower ends thereof which have transversely extending bolt slots formed therein. First and second trailing arm mounting brackets are positioned below the first and second frame brackets, respectively, and have bolt openings provided in an upper mounting plate portion thereon to enable bolts to adjustably secure the trailing arm mounting brackets to the frame brackets. The lift axle suspension system is operatively connected to the mounting brackets. The connection of the first and second mounting brackets with respect to the first and second frame brackets permits the lift axle assembly to be mounted on frame members having varying distances therebetween and having varying frame thicknesses.

Abstract: A tag axle which is pivotally mounted to the rear of a vehicle for selectively providing additional flotation for the vehicle. The tag axle includes first and second suspension arm mounts secured to the rearward ends of the frame members of the vehicle. First and second suspension arms are pivotally secured to the first and second mounts whereby the ground-engaging wheels at the rear of the tag axle may be pivotally moved between raised and lowered positions. The pivot connection between the suspension arms and the mounts enables the suspension arms to be pivotally secured thereto, regardless of the width of the frame members of the vehicle and regardless of the distance between the frame members.