I put chains on my B 2650 this fall.
I tried studding the tire in the past. The studs stay in the rear tiers. When you turn the wheels to steer it rips the studs out.
The chains are much more effective. I have been cutting firewood down from the house. No problem getting back up the hill in the snow.
I looked on line for chains,glad I went to the Kubota dealer. They were about $500 cheaper than online.
Not sure what the pattern is called but they work good. I can see that these chains would make a mess of an unfrozen lawn