Dynamic vs Static Roof Load: What Every Rooftop Tent Buyer Needs to Know Here’s the lie that gets people hurt: “My roof rack is rated for 150 lbs, so my 140-lb rooftop tent is fine.” Wrong. That 150-lb rating? It’s the dynamic load limit—the maximum weight your roof can carry while driving. When you’re parked with two people sleeping in that tent, you’re loading 400+ lbs onto a roof designed for 150 lbs of dynamic load. Most people don’t know the differe