On Friday during the practice session for the NASCAR Cup Series at Iowa Speedway, tire issues were the main topic of discussion. When there were issues at Bristol earlier this season, NASCAR and Goodyear issued an extra set of tires to teams in the middle of the race. Prior to the start of the Iowa Corn 350, we will not see Cup Series teams receive more tires. It remains to be seen if NASCAR would change that plan after the first stage at Iowa or not. This let’s teams know they will only have 10 sets total to get through the race. During the Xfinity Series race on Saturday, drivers were able t…