The tire pictured seems to be overinflated. On the second pic, we can see that the top of the tire is very round (too much IMO). Do you know the pressure?
I would agree - it does look over inflated but the dealer said that was the style of that tire. The tire was naturally round like that. Sorry - I don't know the pressure. I'm told they tried to mount the more squared turf tires and it rubbed so they went with the rounded model.
I saw some nice turfs on a B7800 that were more squared but the tire didn't have as aggressive treads - they weren't as deep. Sorry no pics of that one.
The turfs on that B2630 shown really set the tractor up a bit. I bet it lifts it at least 4 inches.
I was looking at my manual last night and there are different sized rear sizes listed. I think it was 12.4-16 for R4s and 13.6-16 for turfs. The turfs I saw on the B2630 were 13.6-16.
I'm no tire expert - I'm just making observations.