In accordance with the regulations laid down by the FIA (Fédération Internationale de l'Automobile) Pirelli will supply two different types of tire designed for two different types of use.
The first type of tire has been designed for dry surfaces, while the second is for wet surfaces.
The rim diameter is 13 inches equally for front and rear.
The tread width of front tires.
The tread width of rear tires.
The diameter of dry tires.
Compared to the dry weather tires, the wet versions have a 10mm larger diameter.
Dry weather tires, known as slicks, are characterized by a tread pattern that is devoid of blocks or channels. They come in four compounds: supersoft, soft, medium and hard. The different compounds mean that the tires are well suited to a wide variety of circuits, according to the type of asphalt, the number and severity of the corners, and the top speed on the straights. This allows the teams to make use of an ample range of strategies.
Wet weather tires, characterized by grooves in the tread pattern, are split into two types: full wets and intermediates. The full wet tires can be easily recognized by the deep grooves in the tread pattern and sipes to drain off water on wet asphalt. The intermediates feature channels that are less deep and are designed for damp or slightly wet surfaces, as well as uncertain weather conditions.
Cinturato™ Green, the intermediate for light rain. After the excellent performances seen from this tire throughout the 2011 season during particularly demanding races such as the Canadian Grand Prix, Pirelli’s engineers decided not to make any changes to the intermediate tires. The shallower grooves compared to the full wet tires mean that the intermediates do not drain away as much water, making this the ideal choice for wet or drying asphalt, without compromising on performance.
Cinturato™ Blue, the full wets. Of the two wet tires, only the full wet has been significantly altered compared to the 2011 version. The changes relate to the rear tires, which use a different profile in order to optimise the dispersal of water in case of aquaplaning and guarantee a greater degree of driving precision. Characterized by deep grooves, similar to those seen on a road car tire, the wet tires are designed to expel more than 60 litres of water per second at a speed of 300 kph: six times more than a road car tire, which disperses about 10 litres per second at a much lower speed.
P Zero™ Red, a supersoft for street circuits. Of the four slick tires, this is the only one to remain unchanged from the 2011 season. It showed itself to be particularly versatile, offering high peaks of performance over slow and twisty circuits that are characterized by slippery asphalt and low lateral loads. This is the ideal compound for street circuits or semipermanent facilities.
P Zero™ Yellow, softer with less blistering. The new soft tire is well suited to circuits with low tire wear. It is designed to offer a high level of grip coupled with a significant amount of degradation, resulting in a comparatively short lifespan that will give the teams a greater number of options with pit stop strategy and even closer racing. Compared to the equivalent tire in 2011, the new soft offers greater thermal resistance to reduce the risk of blistering. Tested for the first time during free practice at last year’s Abu Dhabi Grand Prix, the new soft tire is set to be one of the most frequent nominations in 2012, together with the new medium tire. This combination offers a great deal of flexibility and also a rapid warm-up time.
P Zero™ White, the medium tire that is well suited to all conditions. This extremely versatile tire adapts itself well to all sorts of track conditions, particularly when asphalt and circuit characteristics are variable. The brand new P Zero™ White is intended as the ‘option’ tire on tracks with high temperatures or abrasive surfaces and as the ‘prime’ tire on tracks that are less severe with fewer demands on the tires. The new medium compound was tried out last year during free practice at the German Grand Prix and made another appearance during the young driver test in Abu Dhabi.
P Zero™ Silver, hard but not inflexible. The new hard tire guarantees maximum durability and the least degradation, together with optimal resistance to the most extreme conditions, but is not as hard as the equivalent tire last year. The P Zero™ Silver is ideal for long runs, taking more time to warm up, as well as being suited to circuits with abrasive asphalt, big lateral forces and high temperatures. The new P Zero™ Silver was tested at the Barcelona circuit by Pirelli’s test driver Lucas di Grassi, and is the only one of the new compounds that the regular drivers have not yet experienced.
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