Not all tractor tires are created equal. Many different depths of tread. Note the picture of the new ones here. I intentionally bought some tires for my former Yanmar with shallow tread for the purpose of not tearing my grass up as bad. In my opinion they were much better in that situation than my former ricers. https://agtireoutlet.com/product/2658
I like those shallower tread rears. I have 'standard' ags on mine and wish they were shallower, or better yet, industrial. Since that's requires a rim change I won't be making the switch, but if I keep this machine long enough to need new tires I'll consider something like yours.
Are those custom hub caps or cement wheel weights?