Cooper Discoverer STT Pro is the most extreme all-season, off-road tire Cooper® offers to date, giving a remarkable off-road performance without sacrificing on-road traction. Discoverer STT Pro tire design has a unique hybrid 3-2 tread pattern reduces noise and increases stability. It is also designed with alternating shoulder lugs, anti-stone retention, and mud release dimples. These Cooper Discoverer STT Pro tires now 25% off and ships free.