If you have LT tires on a trailer in PA, it won’t pass inspection

That’s important information. I would have to think trailers are easy pickin’s for DOT. It’s not like a person pulling one is inconspicuous. Can they just pull you over and check the trailer equipment or does there have to be a reason first?
It is important we all pull safely for everybody’s sake.

It's totally incorrect information, but I wanted to offer an explanation as to why what he was specifically told, and by whom, was incorrect.

It was on a trailer forum many years back that one owner got in a accident caused by a blowout, which damaged trailer and tow vehicle and was using incorrect tires based on the tire label on the trailer. I can't recall if in the end they settled, but I know he was harassed by the insurance company for not having the tire spec listed by the manufacturer and I believe the DOT for the state he was in.

As I followed up with, I could be wrong on the above, as this was one of he many stories in the many heated threads they have on these forums about tires. Much like "which oil is best" on the car forums. The topic is covered regularly and opinions vary.

If you have LT tires on a trailer in PA, it won’t pass inspection

I had many issues with Carlisle and Marathons, now I have the New Goodyear Endurance - no issues yet! KOW! I was told they are made in the states.

I just spent 20 minutes trying to find the exact PA law prohibiting LT tires on trailers. And I can't find one. This was the passage concerning trailers and there is no mention of trailer rating required. If you follow the references, there is no mention of trailer rating requirements either.

http://www.dot.state.pa.us/Public/DVSPub...SubchapterG.pdf

The Goodyear Marathon is going the same way as the do-do bird.
In its place is the Goodyear Endurance 20575R15 load range D (8 Ply)
Product # 724861519.
A new tread design help tire to remain cool while towing heavy loads.
A big improvement over the old Marathon with beefier sidewall construction.
Better inner liners minimizes air loss in trailer applications because of 100% halobutyl rubber.
Hope this helps

LT tires explained and they can be used on trailers IF used as designated below. Notice the size of the tire though.

LT = If a tire size begins with "LT," it signifies the tire is a "Light Truck-metric" size that was designed to be used on vehicles that are capable of carrying heavy cargo or towing large trailers. This includes medium and heavy-duty (typically 3/4- and 1-ton load capacity) pickup trucks, sport utility vehicles and full-size vans. Tires branded with the "LT" designation are the "little brothers" of 18-wheel tractor-trailer tires and are designed to provide substantial reserve capacity to accept the additional stresses of carrying heavy cargo.
7.50R16LT 112/107Q, 8.75R16.5LT 104/100Q or 31x10.50R15LT 109Q

LT = If a tire ends with "LT," it signifies the tire is either an earlier "Numeric", "Wide Base" or "Flotation" Light Truck size designed to be used on vehicles that are capable of carrying heavy cargo and towing trailers (Numeric sizes), use 16.5-inch diameter rims (Wide Base sizes) or are wider, over sized tires designed to help the vehicle drive on top of loose dirt or sandy surfaces (Flotation sizes). This includes light, medium and heavy duty (typically 1/2-, 3/4 and 1-ton load capacity) pickup trucks and sport utility vehicles. Tires branded with the "LT" at the end of their size designation are also the "little brothers" of 18-wheel tractor-trailer tires and are designed to provide substantial reserve capacity to accept the additional stresses of carrying heavy cargo.
195/70R15C 104/102R

That says vehicles towing trailers, not trailers, BTW.

From my experiences, if you got near 5 years on trailer tires, you did good. I pretty much end up getting new ones every 3 years, if they last that long.