Those appear to be the latest version of R4 tires. There was a tire grooving thread a while back in which I erroneously showed a photo of the same tires and referred to them as R14 tires but @Orange man corrected me.Mowed 6 acres and cleaned the deck. Lots of clover this time of year and it sticks to the bottom of the FDR2584 well. I love the clover smell though.
Side note. Can someone tell me if these are R14's or some type of R4?
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Does tire grooving really work?
I have 4 tenths of a mile driveway to plow with hills and turns. Gave up on the plow truck because I always ran out of room due to piles and had to get the tractor out to move piles so I could continue to plow. Thought this is stupid and sold plow truck and tractor and purchased a low hour...

R4 latest
R14