Pirelli's new tire policy

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Pirelli's new tire policy
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T he teams breathe a sigh of relief. Pirelli has a new policy with its tires. A trend has been observed for the last 3 races. The starting pressures of the rear tires drop. In contrast, they remain extremely high at the front. That has consequences. The front tires heat up more slowly than the rear soles. Especially in Singapore, some drivers had problems with it.

Surprisingly low tire pressures for Malaysia

Spa was the last race in which Pirelli inflated the tires into a balloon. 23.5 PSI front, 22.0 PSI rear. But since Monza, the Italian tire manufacturer seems to have lost the fear that the rear tires would not be able to withstand the stresses. It started with 23.5 and 21.5 PSI and was lowered to 23.0 and 20.5 PSI on Saturday.

In Singapore, too, Pirelli corrected the originally prescribed starting values. At the front it stayed at 20.0 PSI. The rear was reduced from 17.5 to 16.5 PSI. One engineer said: “These are almost the same pressures as they used to be.”

The skeptics are even more surprised about the tire pressures that will apply at the upcoming Grand Prix in Malaysia. 21.5 PSI at the front, only 18.5 PSI at the rear. “We only had less than 20 PSI on street circuits recently.”

Have the tires got lighter?

The question remains, why Pirelli is currently more worried about the front tires than the actually higher ones loaded rear tires. Pirelli explains its new policy by allowing the teams more freedom in the camber of the front. In Monza it was allowed to drive with 3.25 degrees, in Singapore with 3.75 degrees. 'More falls also means that we have to remain strict with the air pressure.'

At the rear, the tire supplier from Milan does it the other way round. No pardon when it comes to camber, but more leeway with the pressures. But there are apparently other reasons for the sudden worry about the front tires.

Because of the greater camber, the soft compounds tend to blister near the inner shoulder. And standing waves are observed more and more often in the flanks when braking. That damages the carcass. The best recipe, however, is high air pressure.

Some teams even suspect that the rear tires have changed. Apparently in a direction that makes them more resilient. One team has not trusted the roast for a long time and is constantly measuring the weight of the tires. Accordingly, four tires without rims weighed 15.6 kilograms until the Hungarian GP. After that only 15.1Kilograms.

From this one can conclude that the construction of the rear tires has changed. It could also be a reason why the balance of power changed after the summer break. The lower tire pressures seem to play into the cards for some cars.

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