Mad Jam in Madrid – 13-15th September Posted on September 7, 2013 by Effraim — Leave comments ↓ Lot of events this year in Madrid, Spain. Next weekend this contest is going to take place at ExpoBike, a big bikes festival. Organized by Action Wheels BMX shop. 1000€ on prize money for op 5 and 2000€ for top10 on clothes and bike parts.