As far as the "you need a bigger tractor comment", big tractors without chains all around will sit on the side of a SCUT in the same driveway and spin on the side of it, big tractors are great for some things and not for others, most people on this site have no use for a big tractor.. Bigger is not always better for everyone. If you have a big tractor and have use for it great but don't give the "you need a bigger tractor" nonsense to someone that's looking for better traction on there smaller machine, it just makes no sense..
What is a bigger tractor?
I believe that my Branson 8050 would be considered large on this forum, even though I don't consider it so.
I could not even attempt to traverse my driveway when it is snow covered without chains, unless I studded my R1s.
And I have 1200# of wheel weights on the rear wheels.
My rear chains are on all winter the fronts as needed.
One reason for the fronts to be as needed is that chains do upset the front - rear bias a bit and I already have plenty of lead in the front.
Even with 80 hp I plow down hill and bob tail it back up to plow down again. I have attempted to plow up mainly out of curiosity,
it doesn't work well. Front blade, back blade, bucket it doesn't matter once they make contact with the ground even chained all the way around
progress tends to diminish rapidly and tire spin increase even with Euro style chains on all 4. Plow trucks with ladder chains on all 4 wheels and loaded sanders in the bed also couldn't plow up without losing traction.
On more level ground in previous years I have plowed with just the rear chains in deep enough snow that it was spilling over the top of the blade (which is 30" high) opening up fields to spread manure and give cows a path to and from feed wagons. Snow that was to deep to drive thru with 200+ hp and chained 4wd with a manure spreader.
PS. I believe in chains for all tractors in snow and definitely on ice if controlled travel is desired.
Lou