1 1/8-in. lugExtended-wear rubber compound for even longer life and better value!Revolutionary all-conditions tire: it's a 6-ply mud tire that's designed for the trail, a trail tire that slings mud with the best of them!Unique center tread contact area provides a smooth, radial-like ride. Priced right. You won't find a tire that's lighter, tougher or more capable at such a reasonable price!