Pirelli marked the different types of tyres with six different colours
Supersoft compound (red)
Soft compound (yellow)
Medium compound (white)
Hard compound (silver)
Wet compound (orange)
Intermediate compound (light blue)
|Max complete wheel diameter||Tyre width|
|Dry compound||660 mm||245 mm||325 mm|
|Wet compound||670 mm||225 mm||325 mm|
|Intermediate compound||665 mm||225 mm||325 mm|
Pirelli predicts a possible four or three pit stop strategy in Sepang circuit due to higher track temperatures and more rapid tyre degradation than was experienced in Melbourne .
Pirelli selected to bring hard (prime) and soft (option) dry compounds for the first race in Melbourne . The hard offers balance between performance and durability , while the soft gives extra speed at the expense of resistance . The two wet tyres (extreme weather and intermediates ) will be the same to pre-season testing .
credit : Red Bull Racing
Red Bull at Barcelona test on March joined the club of teams to use a tyre heat sensor to record the temperature of the rear Pirelli tyres . The sensor was placed inside the right wheel as pointed by the red arrow .
Pirelli and Bridgestone tyres have significant differences in skeleton structure, so Pirelli tyres suffers different shape deformations especially when cornering and decelerating than Bridgestone . Deformations may increase or even decrease tyre contact patch and even cause excessive ware . To understand this phenomenon and how tyre shape changes depending on longitudinal and lateral forces applied on the wheel-tyre combo, Lotus Renault during Jerez test used a wheel force transducer on both the rear and front wheels . Apart from the tyre dynamic evaluation , the wheel force transducer can also provide help on perfecting the suspension settings especially when kerb riding.
That type of device is fitted on modified rims and provide data about range of forces suffered by the wheel at different rotation speeds (r.p.m. ) . It is consisted of a magnesium rim , a sensor body of Titanium alloy and sensors and it is not the first time Renault uses such a device .
Mc Laren among other tasks at Jerez was also to examine carefully the front tyres temperature variations . For that reason mechanics planted an infra red tyre sensor below the radiator inlet . Teams till now expressed concerns about Pirelli tyres excessive ware and it is obvious that managing tyre performance balancing ware and optimum grip would give an advantage over rivals.
Jerez , February testing
Pirelli replaced Bridgestone as the official tyre supplier in 2011 season . During the first two Winter tests at Valencia and Jerez the front tyres of Pirelli were found to be less “strong” compared to Bridgestone , suffering greater degradation . For that cause Force India at Jerez housed an infra red sensor inside the left mirror to monitor tyre temperature . The data gathered will help the team to understand tyre working temperature , tyre ware linked to temperature and to adjust better front suspension set up by increasing or decreasing tyre contact surface on track in order to get the maximum from the Pirelli tyres .