 In addition to these tests, Goodyear (in conjunction with NASCAR) stages closed practices to test tire combinations for NNCS tracks.NASCAR does not limit testing at non-Nextel Cup Series circuits (using Hoosier, Michelin, or non-current Goodyear tires) such as Kentucky, Rockingham, Greenville-Pickens Speedway, Milwaukee, Nashville, or USA International Speedway.Many teams also use Virginia International Raceway for road course testing.