Unless you change components, manufacturers max ratings for the vehicle doesn't change. What does change are the tire ratings. Be aware of your max tire ratings, both for singles load and duals load at the proper pressure.
Our commercial tire supplier just found out that a load rate H tire from Continental was different from a Goodyear. One had an axle rating of 18,000 and the other 20,000 on an axle rated for 20,000 for the pair. In the case of the 18,000 tires, the vehicle front end rating of 20,000 was reduced to the weakest link of 18,000 because of the tires. Both manufacturer sticking with the govt required "H range" but one tire having less capacity. Afterall, it is a range!
