For plowing snow, the narrower the tire, the better the traction. Wide tires tend to ride up on the snow, whereas the narrow tire will move closer to the pavement. I had very wide tires on my plow truck, and it was always getting stuck. When I put narrow tires on it, I had no more problems. When I plowed with my Bolens HT20, I used chains, and it slipped a lot. Now I snow-blow with a BX22, and it has enough weight in the rear, that it doesn't slip at all. If you need extra weigh, consider a weight box or having the rear tires filled with Rim Guard.
Dusty