In January 2008, Milan-Pirelli (Italian tyre manufacturer, 2008-2010 FIA World Rally Championship refers to the official tyre supplier) showed the public a second set of tyres for next year's World Rally Championship. Following the launch of the WRC Asphalt Pavement at the end of September last year, Pirelli's new sand tires have also made their debut. The tire has undergone several tests throughout Europe, including the Peugeot 307 WRC by the Italian Rally champion Paolo Andreucci of the Bozian Racing.
Pirelli's new sand tyres are named Scorpion, which strengthens the connection between tension tyres and Pirelli tyres fitted to off-road vehicles and SUVs. Like the asphalt pavement WRC rubber that year, the new sand tires have been inspected and approved by the FIA's governing body, the FIA. What is currently approved for production is the new gravel rally covers for sandals that use sand protection. Here are some technical details about the new Pirelli Scorpion Sandy tires produced by Pirelli for the FIA ​​WRC:
1. Design
The design stems from Pirelli's many years of experience in designing sand-laden tires, with particular emphasis on the suitability of new tires, as they need to perform equally well on hard and compact gravel roads, on muddy and loose gravel roads.
After several comparative tests, an asymmetrical and directional design was finally selected in order to achieve maximum grip during acceleration and braking and to provide good lateral grip. The regulations of 2008 cannot be adjusted or modified midway through the raccoon tire race of the Pirelli World Rally Championship. This means that the tire design needs to meet very wide and extreme requirements from the start.
In order to extend the life of the tire and increase the tread pattern depth, the diagonal block has been redesigned. Their angle is different from the extension of the shoulder to the extension of the tire, making the tire produce a better response when turning.
2. Structure
In order to comply with the regulations for disabling explosion-proof foam in the 2008 competition, the tire structure has been greatly enhanced. Improvements are mostly around the side walls of the tire. This is the weakest part of the tire and it is easy to scratch or cause malfunctions due to sharp stones or other roadside obstacles.
The new construction is based on a solution developed on the 'run-flat' technology that has been used by Pirelli to produce road car tyres and has achieved very good results. While minimizing the risk of tire damage, these tires can also allow the car to reach its destination if the tire has been damaged without losing much time or damaging the body and other parts. Tires can be easily replaced on the next section. Pirelli's materials for the Ryukyu Sandy Tyre manufactured for the International Motor Rally represent the latest cutting-edge technologies in the field of strength and lightness. The technology was developed by Pirelli's well-known R&D department.
3. Product mixture
Just like asphalt tires, only two Pirelli sand tires can be used to solve all the conditions that may occur on the sandstone track at this year's International Auto Rally Championship.
One is a soft tyre for soft ground or mud – suitable for games in the United Kingdom, etc. The other is a hard tyre for car rally on the rough surface. Many current international rally championships fall into this category. All Pirelli tires are in compliance with the environmental regulations to be implemented in 2010, and the use of aromatic oils has been completely eliminated in the production process.
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