NASCAR adds practice session for tires

Mark Martin, driver of the #55 Aarons Dream Machine Toyota, practices for the NASCAR Sprint Cup Series Series Quicken Loans 400 at Michigan International Speedway on June 15, 2012 in Brooklyn, Michigan. (June 14, 2012 - Source: Drew Hallowell/Getty Images North America)

Mark Martin, driver of the #55 Aaron's Dream Machine Toyota, practices for the NASCAR Sprint Cup Series Series Quicken Loans 400 at Michigan International Speedway on June 15, 2012 in Brooklyn, Michigan. (June 14, 2012 - Source: Drew Hallowell/Getty Images North America)

Faced with blistering speeds, and well… blistering tires, NASCAR and Good Year have changed the left side tire to be run in Sunday’s Quicken Loans 400 at Michigan International Speedway.

A practice at 6:00 pm has also been added to the schedule.

Jeff Gordon was one of the first drivers to break the news on twitter:

Just heard from @NASCAR there will b a left side tire change for the race on Sunday. No change for qual. 6pm pract on new tire tomorrow.

This of course is a cause for concern. Additional practice time prior to a race creates more chances for something to go wrong as crew chief Slugger Labbe noted.

Worried about added practice engine miles as well, almost 2 limit already #always nervous

Yes. Sending 2 ls tires. 4020 and 4390. Pulling data now. Old tires x 5 years old

The session will last from 6:00 pm to 7:15 pm. A total of 14 teams had complained of blisters on the tires supplied for Sunday’s race.