An international track racing event is being planned for six days this September in Las Vegas, to coincide with Interbike, according to a report by VeloNews . Former U.S. Olympian Jack Simes III has booked the Mandalay Resort arena for track racing events starting Sept. 23. VeloNews reports that "planned events include Madison races, sprints, one-lap record attempts and motor-paced Derny races."