Oldud -
Sorry for the long delay. My Craftsman is also a garden tractor. The standard tires that come with most Garden tractors are "Turf" tires. "Ag" tires (short for "Agriculture", also known as "R1" tread) are what you see on most farm tractors. Rather than the lugs you see on turf tires, they have ribs or bars set at an angle. The tracks they leave look like a herringbone pattern (or a sort of broken "V" shape).
Since my earlier post, I've had a chance to use them in the snow. They work better than turf tires, but turf tires with chains work better than Ag tires without chains... especially when backing up. I have problems backing up even a moderate grade with bare Ag tires in snow or ice. I used the 55# wheel weights on both the turfs and the Ag tires.
I've since added my old ladder-style chains on to the Ag tires. They were a bit too small, so I had to use some wire to hold the ends together temporarily (I keep telling myself I'll add some links, but haven't gotten around to it yet). The chains have helped a good bit. The Craftsman does most of my plowing with this set-up, though I have to get out my Compact Tractor or bug my neighbor (with the F-350 pickup) to plow after the heavy stuff.
In summary, if it were just for the snow plowing that I needed the extra traction, I would have left the turf tires on and used chains and wheel weights in the winter. However, I can't use the chains with my mower deck, so I needed something besides turf tires (even with the weights) on my hills in the spring/summer/fall. The bare Ag tires fit my needs well when I'm not plowing snow.
John Mc