Does anyone use regular car tires for their Scamp? I understand most modern campers are loaded down behemoths and need the proper tires.  Are the side walls of a car tire really too flexible for a lightweight fiberglass camper ? I ask because it appears all trailer tires are now made in China and are usually greater in price compared to the passenger USA made 175 or 155/80/13 you can get at Walmart, Les Scwab ect. for under $40 each.  If a person kept their 13' Scamp weight well under 1500 lbs loaded would passenger tires serve safely? Any real experience out there or just typical internet info relay?