Tyres

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Tyres

Glossary

Tyre	Meaning
	Soft Maximum grip, quick degradation.
	Medium Balanced speed and durability.
	Hard Endurance, stable but less grip.
	Intermediate Versatile wet condition performance.
	Full Wet Extreme rain grip, displaces water.

Summary

Formula 1 tyres differ significantly from regular everyday car tyres, as they are specifically engineered to withstand the extreme forces, high temperatures, and substantial lateral loads experienced during Formula 1 racing. The composition, structure, profile, and shape of the tyres play a crucial role in their on-track performance.

Pirelli, the official supplier of tyres for Formula 1, offers teams a selection of three dry-weather tyre compounds: hard, medium, and soft. Additionally, for wet conditions, teams have the choice between intermediate and full wet tyres. Depending on factors such as track surface, temperature, humidity, and other conditions, teams strategically adjust their tyre selection to maximize performance.

Tyres Explained

Pirelli provides five different tyre compounds for Formula 1: C0 (hardest), C1 , C2, C3, C4, and C5 (softest).

Soft Tyres

Designed for maximum grip, these tyres offer optimal performance in high-speed corners. However, they degrade quickly if excessively stressed.

Medium Tyres

Striking a balance between speed and durability, medium tyres provide good grip while enduring more wear than their soft counterparts. They are chosen to maximize car performance without compromising longevity.

Hard Tyres

Engineered for endurance, hard tyres can withstand multiple laps with better durability than their softer counterparts. Although they offer stable performance, their lack of grip often results in slower lap times. Teams opt for hard tyres when aiming to maintain a consistent pace throughout the race.

Intermediate Tyres

These versatile tyres excel in wet conditions. They offer greater grip than full wet tyres, making them a popular choice among teams and drivers. Intermediate tyres can be used in various rain conditions until the track is ready for slick tyres.

Full Wet Tyres

Specially designed for extreme rain conditions, full wet tyres feature thicker tread blocks to enhance grip on the track. Capable of displacing up to 60 liters of water at speeds of 300 kilometers per hour, they are exclusively used when standing water is present. Intermediate tyres are favored when feasible to maximize performance.

Tyre Construction and Materials

The construction and materials used in F1 tyres are highly complex and sophisticated. To ensure the utmost safety, these tyres undergo rigorous testing before being approved for Formula 1 racing.

The rubber compound employed in F1 tyres is comprised of four compounds mandated by the FIA regulations. These compounds are specifically tailored to suit vehicle and track conditions. Pirelli, the exclusive tyre supplier for F1, manufactures these tyres.

Rubber Compounds

The rubber compounds primarily consist of a combination of natural and synthetic rubber, carbon black, and other chemical additives. The materials used in the compound influence qualities such as hardness, softness, and grip on the road.

In addition, the tyre compounds must possess strength to withstand extreme temperatures, lateral forces, rapid acceleration, and deceleration. Moreover, the tyre compound influences the rate at which a tyre degrades or "wears out" during a race due to its sensitivity to temperature. While a tyre that degrades quickly may initially offer better grip, it will experience reduced performance and may require more frequent replacements, impacting the overall race strategy.

Tyre Regulations in F1

Tyre Size Rules

Traditionally, Formula 1 cars utilized 13-inch wheel rims with tyres measuring 26.4 inches (67 cm) in diameter. The front tyres were 30.5 cm wide, while the rear tyres were 40.5 cm wide. Intermediate tyres were 5 cm wider than standard tyres, and full wet tyres were 10 cm wider.

However, in 2022, the rim size was increased to 18 inches (45.7 cm), with a tyre and rim diameter of 28.3 inches (72 cm). This new design enhanced the responsiveness of F1 cars during turns, thereby influencing their handling characteristics.

It is important to note that all these measurements adhere to the FIA regulations, ensuring equal performance standards for all participating teams.

FIA Regulations

During a Formula 1 race weekend, each driver must select 10 sets of tyres from the 20 provided by Pirelli, which include 13 dry tyres, 4 intermediate tyres, and 3 wet tyres. For the three practice sessions, drivers are required to use three sets of tyres, with the first set being returned to Pirelli before the next session. This allows Pirelli to examine tyre wear and condition using identification tags.

In qualifying sessions, teams have the option to choose between soft or wet tyres, depending on track conditions. Soft tyres provide better grip and faster lap times, while wet tyres are mandated by race directors when the track is slightly wet or waterlogged.

During the actual race, drivers must utilize two different dry tyre compounds. Furthermore, teams have the ability to pre-heat their tyres by wrapping them in blankets and selectively heating only the external surface. This practice helps maintain grip and traction, leading to optimal performance and speed.

Tyre Strategy in F1

When it comes to selecting tyre compounds, teams consider a range of factors such as track conditions, driver preferences, and overall race strategy. Soft tyres are mostly used for shorter races with lots of high-speed turns, while harder compounds are most used suited for longer distances with more straight sections.

Proper management of tyre wear is also crucial. Teams keep a close eye on tyre pressure, temperature, and regularly inspect for any signs of wear or damage.

Weather conditions significantly impact tyre strategy as well. On rainy race days, teams tend to opt for wet or intermediate tyres, which have special tread patterns designed to enhance grip on wet surfaces. On sunny days, slick tyres are the go-to choice as they provide excellent grip and support higher speeds. Additionally, teams must consider the impact of hot weather on tyre wear and take appropriate measures to mitigate any potential issues.

Glossary

Compound

The hardness or softness of a tyre's rubber is referred to as its compound. Harder compounds offer greater durability, while softer compounds provide superior grip on the road.

Scrubbed

Teams "scrub in" brand-new tyres by running them for a few laps during practice sessions to prepare them for optimal performance on race day.

Slicks

These are smooth tyres without grooves, designed for dry weather conditions to maximize contact with the road surface.

Flat spot

A flat spot refers to an area on the tyre's surface where it loses its curved shape. This occurs when a driver locks up the wheels, momentarily stopping the rotation and causing the tyre to scrape along the ground.

Graining

This phenomenon occurs when the outer surface of a tyre becomes hotter than the inside, causing the outer rubber to flex, break off, and stick onto the tyre's surface.

Blistering

When the inner part of a tyre overheats compared to the outer part, it can cause a small explosion from the inside, resulting in damage to the tyre's surface.

Deg

Short for "degradation," it describes the gradual decline in tyre performance due to wear over time. Factors such as grip and handling are affected as the tyre's capabilities decrease.