Don't know the exact answer Gerald. But, for the past 18 months I've had the EZ Rack and two 2 gallon RotoPaxs on the standard 33" tire/rim/mount setup for my Rubicon. So far it's holding up fine.What are the chances that the tailgate with Jeep's reinforcement could hold and EZ Rack with 1 or 2 rotopax? Or a jerry can tray? I've already got a 38" Milestar Patagonia on there.