Toyo M-55. I prefer the 255=85-16 size.
High initial cost is offset by unbeatable life expectancy. I have used them for a 50 mile/day commute summer and winter, over black ice and packed snow, and for cruising mountain roads since 1985. They will stand the washboards, and the sharp edged crushed gravel.
In extreme ice conditions, I have had them siped. Siping is an amazing benefit on slick ice. But siping detracts from their life on gravel roads. And, they will get you through a mud hole in the meadow when feeding stock, as long s there is a bottom down there somewhere.
