STRs are NON performance, boring street tires but cheaper.
The Scorpion STR A and Scorpion STR tires are Pirelli's premium Highway All-Season tires that were designed to deliver the Stability, Traction and Ratings (STR) appropriate for today's light trucks by adapting their performance to the needs of sport utility vehicles, light duty pickup trucks and 4x4 vehicles. The Scorpion STR tires are designed to combine a quiet and comfortable ride along with ease of handling and year-round traction, even in light snow.
The Scorpion STR's tread compound is molded into one of two similar, but slightly different symmetric tread designs. The tires featuring Pirelli's North American tread pattern are identified as Scorpion STR A tires, while those featuring their European tread pattern are simply identified as Scorpion STR tires.
The Scorpion STR A tire's North American tread pattern features continuous shoulder ribs and narrower groves between all of the independent tread blocks. This type of tread design would tend to result in a quieter, more even-wearing tire.
The Scorpion STR tire's European tread pattern features lateral grooves through the shoulder ribs and larger grooves between all of the independent tread blocks. This type of tread design would tend to result in a tire with better hydroplaning resistance and wet traction.
On the inside, both Scorpion STR tires feature twin, high- tensile steel belts reinforced with polyamide to provide strength and durability on top of a two-ply polyester cord body that helps cushion the ride.
Scorpion Zero
Derived from Pirelli's legendary P Zero performance tires, the Scorpion Zero is a Street/Sport Truck All-Season tire for sport utility vehicles and pickup trucks. The Scorpion Zero was designed to provide year round traction and handling for drivers who operate their light truck vehicles primarily on-road in various weather conditions, including occasional light snow.
Depending on tire size, the Scorpion Zero radial's tread compound is molded into a single Z or double Z (two rows of Z-shaped tread blocks situated side-by-side) intermediate tread blocks to provide responsive steering, along with enhanced cornering and braking capability. Lateral grooves and wide circumferential grooves provide water evacuation to resist hydroplaning and enhance wet weather traction. Pirelli Scorpion Zero tires combine high-speed precision with low noise levels.
Pirelli Scorpion Zero Street Sport Truck All-Season tires feature a black letter sidewall styling (with some sizes accented by a yellow scorpion icon). They are H- or V-speed rated and are available in 65-, 60-, 55-, 50-, 45-, and 40-series Euro-metric and P-metric sizes to fit 15" through 20" diameter wheels.
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