Tyler- Loader-Mutt DOES have really wide fronts, but I didn't have it at FPD as Rick suggested... that was clearly someone else...
But don't take MY wide fronts in same context as doing same with 'normal' steering- mine's all full-power hydraulic, and my knuckles are home-made, with farther offset, and wide trailer wheels... different scrub radius- it'd be murder to tryn' steer 'em with a conventional CUB Cadet steering box. As it is, all my steering forces go from the knuckles directly to the front of the frame, not through a drag link... it'd destroy a normal drag link (and has destroyed a conventional tie-rod). Don't remember off the top of my head, but I think Loader-Mutt's final tires were Carlisle 6-ply trailer tires in 20-8.50-8... don't remember, 'cause I tried like... three different sizes. I know the 20-10.50-8 ags would hang up a lug on the side of the loader-bracket at full lock.
Dunno about the super-steer mod clearing any wider- or larger-diameter tires... from what I've seen, they CAN (under correct conditions) allow steeper steering angles, and the drag-link relocation trick will allow the steering box to make more steering angle available, it does reduc e the amount of leverage available to steer. In my case, larger tires at steep steering (and LM steers about 8 degrees TIGHTER than a typical WF)would've fouled the frame immediately if the loader bracket wasn't already in the way.
For light steering in agri-plowing conditions, narrow tri-ribs would be the choice, while mowing side-hills would warrant very aggressive turf treads or ags on front. Wide tires make for greater scrub, so don't expect lighter steering with wider treads.
In the case of Loader-Mutt, I needed two things- support capacity (more plies) and the ability to distribute weight on soft ground... to prevent sink-in. The wide trailer-tires gave both support capacity (like... 800lbs/tire) and floatation surface. Without seriously aggressive tread, they tend not to pick up the yard into a big mud-barrel, just compresses the soft soil a little as I pass over... doesn't sink-to-china when I carry a bucket-load by. As long as I take it easy on the drive-treadle, I can 'tread lightly' over soft ground and basically only push down the grass and leave temporary chevron-marks where I've been. Putting the bucket to the earth, however, will cause the ag rears to turn up the ground, as will stabbing the treadle into reverse while moving forward... fills my boots with mud pretty quick. ;-)