I have the 420 loader on mine, the 430 loader might work better with these tires as far as backdragging and angle of contact with the ground, because of it's longer reach. I still think that these tires would contact the loader arms if set to the wide stance. Because they are taller, when you move them out relative to the pivot point, they are farther forward when turned in all the way, and with the angle that the loader arms have when all the way down, the inside of the tire, hits the arm. This might even be worse with the 430, don't know.
I asked about upgrading the the 430 loader, but the dealer wanted $1,200.00 to do it, and now, with mine all beat up from use, it would cost me even more.
I really can't tell you how good the floatation is on these front tires, I haven't ever had it in any deep mud yet. But these tires do have great traction and exceptional dig. Even on hard ground, digging into a bank, they will dig holes fast if you get them spinning.
I pulled my 26' enclosed car trailer up an 8% muddy, snowy hill, around the back of my house last month, and made it all the way to the crown of the hill before I couldn't pull any more. Had to use the front loader to crab my way a couple of feet, then was over the top, and away I went. Then had to go back and fill in the holes/ruts, after the ground dried up.
I would sure be interested in a trade for some R-4s if any one is interested. These are great tires, just have some issues with them. I have a 120 hours on them so far, still in real good shape.
Let me know if you'd like to trade, we could maybe meet halfway?
Thanks,
DT