My 6250 GVWR ultra-lite trailer had a delivered weight of 5326 with full LP tanks leaving 924 for cargo. I know I'm close to my cargo limit when packed for travel even with an empty refrigerator an...
I say no big deal overloaded just sitting there. You may have crappy tires. I know I did on my 5th wheel. I even got them to pay half the cost of replacing them. If tires are no good replace them. Just search the web on the make and model of your tires. I am sure you will get some info. JMHO