Slightly aggressive tires are a perfect choice for those looking to upgrade from their original equipment tires.  The tread depths in the smaller size tires (23-25" tall) are comparable O.E.M tires, but the tread pattern will exhibit slightly better traction. Slightly aggressive tires ride smooth and are suitable for all terrain.  They lightly tread on soft terrain and grassy surfaces.  Most of the tires in this category are 6 ply rated, increasing the puncture resistance and tire stiffness from most factory equipped ATV tires.