An agricultural implement system includes a tow bar configured to coupleto a hitch assembly. The agricultural implement system also includes a firstwing toolbar rotatable relative to the tow bar and disposed proximate to a first sideof the towbar. The first wing tool bar has a first send proximate to the first side ofthe tow barand a second end opposite the first end. Further, the agricultural implementsystemincludes a caster wheel assembly having a caster wheel pivotally coupled to asub-frame.The first sub-frame is pivotally coupled to the first wing tool bar proximatetothe second end of the first wing tool bar, and is coupled to the first wingtool bar suchthat the axis of rotation of the sub-frame extends through the first wing toolbar.
