All ActivityMost RecentMost LikesSolutionsIncreasing Towing CapacityGood evening, Who sets the towing capacities for motorhomes? Why is my 25' class A on a P30 chassis limited to a 3500# tow limit, when a 30' class A on a P30 chassis will have a 5000# limit? Both rigs using the same engine/transmission combo. What are the legal and safety ramifications of exceeding my 3500# restriction if a heavier duty tow bar is installed and auxiliary braking is used on the toad? My short rig has all the upgrades on the suspension to improve controllability. I have a buddy who had a 36' Dolphin being pulled by a Ford 460 with a 4500# toad. My 25' with a Chevy 454 is restricted to 3500#. What gives?? Thanks, Sam