There are posters here that list all kinds of various federal regulations. Most, if not all of those apply to manufacturers and dealers. Once the RV has passed the first sale the current owner is pretty much free to install whatever tires or equipment they choose. There are no enforcement police out there that will pull,you over and inspect your current setup for safety regulations. You are pretty much on your own to insure the safety of your RV. Now, if your RV is grossly unsafe and you are involved in an accident, the legal system ma take you to task for operating an unsafe vehicle.
Keith
