trailer tires here...
I have had a number of different types of trailers over the years; travel trailers, car & equipment haulers, and boat trailers. I have never experienced an on-the-road tire failure on a trailer equipped with trailer-specific tires. I have experienced several blow-outs, tread separations, and flats with automotive tires installed in trailer applications.
I don't know what the difference is in construction, or why trailer tires are trailer-specific, but I've decided that I'm using trailer-specific tires on trailers. The manufacturers apparently know things about building trailer tires that I don't understand, but I'm a believer in trailer-specific tires.
AIR 2053 Current: 2006 Born Free 32 RQ Kodiak Chassis, & 1995 Coachmen B-van
Former Airstreams: 1953 Flying Cloud, 1957 Overlander, 1961 Bambi, 1970 Safari Special, 1978 Argosy Minuet, 1985 325 Moho, 1994 Limited 34' Two-door, 1994 B190 "B-Van"