Atturo Tire releases the fourth tire in its Trail Blade series with the most intimidating tire design to date the Trail Blade BOSS . The tread is designed from the Quartermaster QSA-1 BOSS HOG knife, a blade made for heavy duty, hard core use. Alternating shoulder blocks follow the outline of the knife handle tread. The tread s high void ratio provides superior grip across the varied terrain. Smaller center tread blocks are linked for stability from the high abrasion abuse of rocks.