The Automotodrom Grobnik in Rijeka (Croatia) hosted the fourth round of the 2012 UEM Supermoto European Championship with 28 riders competing in class S2. The Championship leader Petr Vorlicek (Suzuki) from Czech Republic was the winner of the heat one on the new venue of the supermoto european championship races. He dominated also in the practice. In the first heat he was closely followed by Austrian rider Lukas Höllbacher, difference was one second and a half. On the third spot Dutch rider Devon Vermeulen finished. In heat two no changes in the first place. Vorlicek was leading from the start and finished with gap of over 5 seconds infront of Finn Sami Salstoa in second place. Third was Höllbacher. In the heat 3 it was the same order on the top 3 places. With new victory and maximum number of points scored in Rijeka Vorlicek extend his lead in the