Heavy Duty All-Terrain 50% Road & Sand, 50% Dirt & Mud The new S/TMAXX arrives after three years in the making, tested in Australia's outback and introducing Cooper's proven Armor-Tek3 carcass construction for the first time in an all-terrain tyre. There is now a tyre constructed and designed to thrive in Australia's harshest conditions, while still offering great on-road characteristics. NEW Super Tensile Steel Belts 15% stronger than �high tensile steel' which results in higher impact strength and puncture resistance. NEW Proprietary Cut-n-Chip Resistant Tread Compound Provides improved wet and dry traction and handling on the highway, while also improving cut-n-chip resistance in harsher rocky and gravel terrain. Armor-Tek3 Shields the S/TMAXX Cooper's unique innovation Armor-Tek3 acts like a shield of armour for the sidewall of your tyres, which means the chances of sidewall damage is greatly reduced.