Brawn also revealed that the ground effect will have a greater impact to create downward pressure. The airflow will be directed from the front wing to the undercarriage, creating downward pressure. But, noise also has side effects on tires. To solve that problem, F1 will increase the tire diameter from 33.02 cm to 45.72 cm. Fans fear that this change will make the car lose its aesthetics.
From 2021, F1 drivers will be able to use 18-inch-wide tires instead of the current 13 inches.
In 2017, according to Pirelli’s proposal, FIA has approved to increase the wheel width from 245mm to 305mm for front wheels and 325mm to 405mm for rear wheels. The height of the cake also increased by 10mm (from 660 to 670mm). But the diameter of the wheel rim remains constant at 13 inches (330.2mm).
Many teams fear that changing the wheel size will force them to spend more money to research the new shock absorber system.
Pirelli, even with a contract until 2019, continues to campaign F1 to accept tires with 18-inch wheels, which were used in Formula E and WEC. They think that this tire is more like the tires of commercial vehicles, so it will be more effective in marketing.
There are some suggestions to use new tires from 2020. But most want it to be in the big technical package that will apply from 2021.
Pirelli’s CEO Marco Tronchetti Provera said:
“We are always open. Obviously, they (FIA) must have reasonable rules and many racing teams agree to do so. There will be aerodynamic problems and shock absorbers related to new tires. When the teams are ready, we are also ready. ”
The wheel is bigger, and the wheelbase will be smaller. The wheelbase – which can be considered as the distance between the two contact points of the front and rear tires – is limited to 340 cm, 20 cm to 30 cm smaller than the present. Gasoline flow will also increase to 110 kg / h, making the engine more noisy and stronger (exceeding 1,000 horsepower). Engine speed will also increase from 10,500 rpm (rpm) to 12,000 rpm. The maximum amount of gasoline will no longer be limited, but drivers may not carry more than 120 kg to avoid extra weight.