 Tún gbólóhùn tó wà nísàlẹ yìí kún un: 2015 Red Bull Ring GP2 and GP3 Series rounds was a pair of motor races held on 20 and 21 June 2015 at the Red Bull Ring in Austria as part of the GP2 Series and GP3 Series. O jẹ iyipo akọkọ ti akoko 2015 GP2 ati akoko 2015 GP3. Ọsẹ òpin eré ìje náà ṣètìlẹyìn fún : 2015 Austrian Grand Prix. Àwọn ojúewé wọnyí jápò: 