Texto simulado: Pirelli needs a bigger choice of dry weather tyre compounds to choose from to avoid low-degradation one-stop races like the Indian Grand Prix. F1’s control tyre supplier has to specify four dry compounds at the start of the season, with two being selected for use in each grand prix weekend. This system was introduced when Bridgestone became sole tyre supplier in 2007 and has continued under Pirelli. But Paul Hembery, Pirelli’s motorsport director, believes that four compounds cannot cover the full range of track surface, configuration and temperature conditions faced over the course of a Formula 1 season.