Your original post didn't state you already had crossbars. Depending on the type, the Thule might be compatible. I know the Yakima tent mounts are compatible with aftermarket aero, curved bars. They state factory crossbars are a no go due to them being too flexible. Anyway, the Yakima awning should have everything included that's required for mounting to crossbars.So a rooftop rent requires a certain set of crossbars not the Thule aero?