The official site of  Detroit Grand Prix is www.hardrock100.com . 28 July – 3 August 2012 was when it was held . The venue for  Detroit Grand Prix was Carioca Arena 2 . 24 (from 5 confederations) teams participated in  Detroit Grand Prix . 18 events were there in  Detroit Grand Prix . 28 from 28 nations were the competitors in  Detroit Grand Prix .  Detroit Grand Prix was established on 1963
28 nations took part in  Detroit Grand Prix