They are only .5 inches larger in diameter and 1 inch greater in rolling circumference than the Kubota OEM 9.5 x 16 R1's. I have attached some pdf's showing data for them.
Somewhere back in this thread was a reference to damage risked by changing the oem circumference, based on drivetrain issues. How did you resolve that?
When I went to replace the rear turf tires on my CaseIH, the oem were those huge wide Bridgestone Pillow tires, extremely long wearing and extremely expensive. I wanted
an R1 tire for field work, and the problem was that the oem turf tire used a 20 inch rim instead of the alternative 24's. Not wanting to change rims, it took me quite a while to find
a few 20 inch rear tires that would fit my tractor, and keep the oem dimensions. And what I would end up with were some really nice BKT R1's, that were much wider than oem, but there's plenty
of room in the rear, unlike the front of my Kubota. And I figured more tire, better flotation, etc on a 2wd tractor.
So while the tires look pretty oversized for the tractor, they "fit" perfectly, and man, they provide some serious grip. And I believe improve stability.
I bring this up because switching tires often involves switching rims, but sometimes, if the numbers make sense, and in my case they did when combining the cost of admittedly less expensive narrower R1's on
new 24 rims, the latter not being cheap at all.
I'm quite happy with the results. I need to put tri-ribs on the front next and I've got my eye on some, 150 apiece, which struck me as pretty reasonable.