I am trying to fit some different rims on my new Metris, but the rims the local tire shop has for me have a load rating of 1520 pounds. I passed on those rims because the manual specifies XL rated tires. I figure that if it needs heavy duty tires then the same should go for rims. I have seen folks on here mounting rims from sedans on there vans, is this safe? How do you find the load rating on the rims? Not all rims are marked, the stock rims are not marked with a load rating. How do I make sure that the rims are up to the task?