There are two parts to the inner layer of the tire. A third steel belt in D and E load ranges and A state-of-the-art casing that more evenly distributes stresses. The outer layer consists of a large contact patch and enhanced tread block stability, noise-minimizing tread block pattern, deep, circumferential grooves that channel water away, Interlocking, full-depth sipes and tread block stability, and a special tread rubber compound.