Carioca Arena 2 were the venues of  Detroit Grand Prix . 24 (from 5 confederations) teams participated in  Detroit Grand Prix . The sport has the official site www.hardrock100.com .  Detroit Grand Prix was established on 1963 . It was held in 28 July – 3 August 2012 . The no. of events in sport was 18 . 28 from 28 nations competed in  Detroit Grand Prix
The sport  Detroit Grand Prix has less than17 contestants  from less than 20 nations