August 15 2014 Pure Michigan 400 NASCAR Practice #1 Speeds and Averages Ryan Rantz NASCAR News, Practice Speeds 10 Lap Averages, Best Lap Times, Fastest In practice, NASCAR, NASCAR Practice Speeds, NASCAR Speeds, Practice Notes, Pure Michigan 400, Pure Michigan 400 Practice #1 Speeds and Averages Pure Michigan 400 NASCAR Practice #1 Speeds and Averages (PDF) Missed practice More