You will find a lot of people swear by the GY 614's. There are others who are using the Sailun brand tires 637's that are basicly the same rated tire as the GY but made by Sailun and they seem to be as dependable as the GY. Others on this site like LT tires and swear by them. It seems in my opinion that the really heavy trailers are the ones that need the best quaility tires. Your trailer is close to what my trailer weights are. I am going to put the Sailun 637's on my trailer. Do some searches online pertaining to trailer tire blowouts. It will give you some very good information. You can also do a search on this site about tires and find lots of people's opinions and experiences.
Good luck. This is one of those topics that stirs up the hornets.
Tom Marty
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