Heavy Duty All-Terrain 50% Road & Sand, 50% Dirt & Mud The STT is designed for the 4WDriver who wants a tyre with grip and puncture resistance to drive the most serious of off-road applications. THE STT IS NOW 25% EVEN STRONGER IN THE SIDEWALLS AND STILL 2.5 TIMES MORE RESISTANT TO TEARING The Cooper STT boasts further advances in carcass construction. Cooper's new super tensile polyester body plies' strength to weight ratio means more strength while decreasing the weight of the tyre. That maintains a whopping 25% increase in carcass strength! CUT-n-CHIP RESISTANT COMPOUND Cooper has made the STT even more damage resistant with a specially developed tread compound which helps to resist the cutting, tearing and chunking commonly found with extended outback use. SUPER TRACTION TREAD A super traction tread employs a combination of features including deep sidewall lugs, notched and scalloped shoulder lugs and a unique centre traction zone to create a bold, aggressive tyre. Sipes (tiny cuts in the tread blocks that squeeze out water from under the tyre) provide excellent wet bitumen grip for an aggressive traction tyre.