They're round, they're black, they keep you on the track. Tyres are one of the most important parts of a Formula 1 car, but getting the best performance from them requires tireless work from drivers, teams and engineers. Three tyre experts join Katie and Christian to explain all you need to know about F1 tyres: Former F1 racer Jolyon Palmer explains why tyres are so important to drivers Mario Isola, Head of Motorsport for official F1 tyre supplier Pirelli, tells us why different tyre compounds are chosen for each race weekend and why F1 tyres wear out McLaren's Director of Race Engineering, Hiroshi Imai, explains how F1 teams choose which tyres to use and the tyre rules they must not break You ask, F1 Explains! Send your F1 question - as an email or a voice note - to [email protected] F1 Explains tackles a different F1 topic every week. Check out our previous episodes using the links below: The 2024 F1 calendar - why it helps make F1 more sustainable Wind Tunnels - the top secret tools where cars are created Race engineers - the voices on F1 Team Radio Pit stops - two seconds of total teamwork Simulators with Aston Martin's Stoffel Vandoorne Racing in the rain with Mika Hakkinen + Haas race engineer Mark Slade Street circuits with Mika Hakkinen + Bernie Collins F1 driver fitness with Alexander Rossi + Sebastian Vettel's former trainer F1 in the USA - why the US has 3 races in 2023 F1 Sprint weekends with Haas driver Kevin Magnussen For in-depth interviews with F1's biggest names, listen to F1 Beyond The Grid. For race previews and reviews, head over to F1 Nation.