India, Sept. 30 -- Pirelli has confirmed the C2, C3 and C4 compounds as Hard, Medium and Soft for Formula 1's return to Sepang International Circuit after a nine-year absence. The Malaysian venue replaces the Bahrain Grand Prix, which was not staged in April, and will test teams with machinery and tyres far removed from those used at the last race there in 2017.

Situated near Kuala Lumpur, the 5.543-kilometre circuit mixes long straights with high-speed corners, especially through the middle sector. Its medium energy demands place it in a severity range similar to Spa-Francorchamps and Shanghai, while ambient and track temperatures will make thermal degradation a central concern across the weekend.

Pirelli's slightly more aggressive sel...