Cooper STT
with Armor-Tek3 Carcass Construction

80% - Dirt & Mud
20% - Road & Sand

Cooper Tires has launched the new Cooper STT, revealing the Armor-Tek3 ply carcass construction that's unique to Cooper.

ARMOR-TEK3 CARCASS CONSTRUCTION
Cooper's STT is now 33% stronger in the sidewalls and 2.5 times more resistant to tearing. It's the heavy duty carcass that makes the new STT so special. In a normal 4WD tyre there are rubber gaps between the sidewall cords. The rubber gaps are the weakest point of the tyre. A nail, a stake or sharp outback grass can push against the sidewall cord, deflect off and penetrate through the weakest point, (the rubber) and you get a flat. What Cooper has done is reduce the rubber gaps by taking its outstanding 2 ply STT and added a third ply on an angle (as 8 degree angle). It's called Armor-Tek3 technology and it's unique to Cooper. While some other 4WD tyres have three plies, none of them have the Armor-Tek3 angle ply.

Here are the other features of the new STT, most notably, modern developments in the deep sidewall lugs, tread block siping and cut, chip and tear resistant tread compound.

SUPER TRACTION TREAD
The new STT's computer-designed, non-directional 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 for serious offroad applications.

DEEP SIDEWALL LUGS
The new STT's aggressive tread design extends far down the sidewall of the tyre to enhance its soft surface traction and also provide additional "bite" in rocky terrain as well as maximum protection from sidewall damage.

TREAD BLOCK SIPING
Each row of the new STT's aggressive tread blocks is siped (tiny cuts in the tread blocks) to squeeze the water out from under the tyre on hard wet surfaces.

CUT, CHIP AND TEAR RESISTANT TREAD COMPOUND
The new STT has a specially developed tread compound that helps resist the cutting, tearing and chunking commonly found in extended outback use.

Australia played a pivotal role in the development of the new STT tread compound. Cooper analysed the results of a prototype set of STT's that were especially sent to Australia and were tested in an outback trip across Australia and back. Cooper also analysed feedback on the Cooper ST-C cut and chip compound tyre that was specially developed to achieve greater mileage on Australia's coarse rocky roads to develop the compound for the new STT.

SCALLOPED SHOULDER LUGS
The notched shoulder lugs of the new STT are scalloped so that one section always has a clear shot at fresh ground for superb traction in soft surface terrain and additional gripping power in rocky terrain.

TAPERED STONE EJECTOR
An integral stone ejector rib extends down from the centre lugs to the sidewall blocks to help prevent stones and debris from lodging between the tread blocks while contributing to the protection from stones damaging the tyre's steel belts.

RIM FLANGE PROTECTOR
Placed in the lower sidewall area, this feature helps protect the wheel and tyre from rocks and kerbs.

FULL SIZE RANGE
The new STT will be available in a full range of high flotation and light truck 15, 16, 17 and 18 inch rim diameter sizes, and is being released in two phases. The first release of 12 light truck sizes is available now and the second release of 14 sizes is scheduled for mid 2005.

The new Cooper STT is one impressive tyre. It's constant improvements like this that make Cooper Tires Australia's fastest growing 4WD tyre brand.