I’m confused. The ride on R1’s is horrible.
I just came off a NH 4835 that had turfs it for its whole life. Tons of field, road and turf driving. Owned it from new. Sold the house and tractor but had a JD 4720 that I bought for the new house A few years back. Smaller frame but same power and that ride was as I mentioned horrible. Tires were dry rotted when I bought it. I just put a full set of Nokia’s TRI 2’s in late spring and the ride is every bit as smooth as the turfs if not nicer.
Just my direct experience running all 3 tires within a few months of each other.
As for the OP. I was lucky my tire size on the TRI’s was no problem going on the R1 rims. I was ready to buy rims with the new tires. Of course the price of tires went insane but that’s another story.