September 25 2015 New Hampshire Sylvania 300 NASCAR Practice #1 Speeds and 10 lap averages Ryan Rantz NASCAR News, Practice Speeds 10 Lap Averages, NASCAR, New Hampshire 10 lap averages, New Hampshire Average Speeds, New Hampshire Practice Speeds, New Hampshire Sylvania 300, New Hampshire Ten Lap Averages, ten-lap averages New Hampshire Sylvania 300 NASCAR Practice #1 Speeds and 10 Lap Averages More