I put the 6-12s on my 1250, and of course, only after I put them on did I notice the one is literally bursting at the seams. Not overfilled, just ran flat and falling apart. I don't know what kind of tractor they came off of, but they're white with the 5 bolt cub rims.
I'll be on the lookout to find a set of nice ones, I guess.
What kind of 6-12s do you guys use on your tractors? I would be fine with either turfs or ags.