I bought a CURT 11334 rack that amazon says fits the car but I'm having a hard time believing it fits with that diffuser on the car. Has anyone installed a hitch on your spark ev? I'm just trying to be able to easily transport my wifes bike which is 72" tire end to tire end the same length as my elliptigo 72" edge to edge which means probably a 60" wheelbase.(center to center of wheel) I might have to send this back to amazon.