Our rack systems are typically designed to support roughly 600LBS static and 300LBS dynamic. For example this equates to a standard roof top tent while on the trail and a few people in the tent when stopped. This will change based on the rack, so please visit the specific product page for more information. *Sherpa is not responsible for failure due to improper use or loading. All load ratings are when evenly loaded and distributed across the rack. It is recommended that customers with hardshell tents distribute their load across 4 crossbars when installing.