Personally, I have Endurance on my KZ FW. I =wanted= the Carlisle HDs as I've had good luck with them in the past, but Discount couldn't get them in time for a trip. An OEM tire gave out on the way from my storage to my house (about 11 miles) with a tread separation. I had 2 days to get tires and the GY were what they had in stock.
Our 30' GN flatbed came with G-rated Providers and the 6 of them give us well over our rated 21k GVW rating. So far, they still look good after 4 years. I'd buy 'em again.
Lyle