My 600 took 12×25 if I recall correctly. Got my set at Fleet Farm along with a chain tightner kit for $40.xx Couldn’t be happier. Let some air out, put on, slightly snug. Fill tires back up. Run up and down the road a few times, starting slow in case something lets loose. Be sure to tie of any excess you have to prevent getting caught on something.
I didn’t let the air out the first time. Couldn’t get them tight.
I love the traction they give me. Pulled a trailer out of the snow bank the other day, never would have gotten there without the chains.