HOOSIER Sports Car DOT – Radial Wet H20 tires feature an aromatic oil-free wet weather tread compound that offers traction for fast and consistent lap times in wet track conditions along with improved treadwear and durability in damp to drying track conditions. This compound is molded into a directional tread design featuring a combination of circumferential and Y-shaped lateral tread grooves. Through the initial portion of their life (between their beginning tread depth of 8/32-inch and approximately 4/32-inch of remaining tread depth) the walls of the tread grooves taper as the tires wear. Through the remainder of their tread depth (between 4/32-inch tread depth and worn out) the walls are molded vertically. This allows the tires to serve as full wet tires when used at their original 8/32-inch tread depth or intermediate wet tires when shaved or worn to approximately 4/32-inch of remaining tread depth due to the reduced tread squirm and increased footprint contact area.