Mercer, PA (April 10, 2013):  Mercer Raceway Park will allow a three-race burn off period for 410 Sprint Car racers to use up their old Goodyear tires.  To be legal, all 410 Sprints must be on EITHER the 2012 Goodyear OR the 2013 Hoosier APPROVED tires.  This is NOT an open tire rule.