September 13 2014 Chicagoland MyAFibStory.com 400 Practice #2 Speeds & Averages Ryan Rantz NASCAR News, Practice Speeds 10 Lap Averages, Chicago, Chicagoland, Chicagoland Average Speeds, Chicagoland MyAFibStory.com 400, Chicagoland Practice Speeds, NASCAR, NASCAR 10 Lap Averages Speeds, NASCAR Average Speeds, NASCAR Ten Lap Average Speeds, Practice Speeds Chicagoland MyAFibStory.com 400 NASCAR Practice #2 Speeds and 10 Lap Averages (PDF) More