We've used them in the past on bat-wing & gauge wheels for a deep ripper (always went flat). They're just fine. They're heavy tires (weigh a lot). Of course, they're many more plies than implement tires. Probably something like 20-30 ply. So, they'll be stiff also.

Re. mounting them on rims, I didn't know you could even put them on ordinary rims, never heard of that. We always bought the rims with them. They supply a split, 2-piece rim. You tell them the bolt pattern, etc.

I had the same problem with bunches of pinhole leaks all over the tires, on the two 11.00 X 16 equivalent tires I put on my D-21. I had ordered the tires with sealant all ready installed in the new rims. I called Gensco and informed them of my troubles and they sent me two more gallons of their anti-freeze / ground newspaper sealant. I installed that and the tires still seeped anti-freeze from every pore. When I finally had all the fun I could have with re-seating beads and inflating flats every time I wanted to use the tractor, I decided to put tubes in the tires. I demounted the tires and dug all the slime out of them and then washed the insides and let them dry good. Put an inner tube in them when they went back on the rims and have had no further troubles.

I can see where mounting them could be a chore for an inexperienced tire jockey, and it would be worse if they also had to install a tube without pinching it. They have thick, heavy sidewalls and the trimmed bead area could be an extra hazard for the tube. I have had no further trouble or "fun" since getting rid of the gunk and replacing it with a tube.