Built for logging, mining, concrete mixers, refuse, dump trucks, and similar harsh service applications, the rugged Toyo M320Z is a premium mixed service tire delivering excellent resistance and retreadability. Featuring a rib/lug pattern with 23/32" tread depth, a tough tread compound, and four steel belt construction, the M320Z is specially designed to protect against cuts and impact breaks. See maintained casing integrity thanks to stone ejector grooves that minimize stone retention, providing increased resistance to fatigue, improved retreadability and a longer casing life.