Good points Stephan. If it has CI grates, that is probably 15 to 20 lbs over the stamped steel ones.
Reason I am asking is that I have a customer that is asking if he would be able to pick up one of my grills with a hitch carrier. I wanted to be able to give me an approx weight so he could tell if the carrier would handle it. If he did that, I would probably suggest he put the flavo bars, grates and lid in side the vehicle. That would likely bring the weight on the hitch carrier down comfortably under 100. I think most of them can handle way more than that anyway.