http://racing.pirelli.com/global/en-ww/p-zero-purple-at-montmelo-the-new-ultrasoft-tyre Purple is the sidewall colour of the new tyre for dry conditions. Will the first day of testing be enough to tell us something about the Ultrasoft tyre? Follow us on: www.pirelli.com Facebook: https://www.facebook.com/PirelliMotor... Twitter: https://twitter.com/pirellisport Instagram: https://www.instagram.com/pirelli_mot...