<a href="http://api.tweetmeme.com/share?url=http://sports.espn.go.com/rpm/nascar/cup/news/story?id=6560423&campaign=rss&source=RPMHeadlines& service=bit.ly&source=espn"><img style="padding-left:10px;" align="right" border="0" style="border:none;" src="http://api.tweetmeme.com/imagebutton.gif?url=http://sports.espn.go.com/rpm/nascar/cup/news/story?id=6560423&campaign=rss&source=RPMHeadlines" height="49" width="41" /></a>Ticket sales for this year's Brickyard 400 are lagging behind last year's pace, and race organizers worry it could produce a second straight record-low turnout for the July 31 race.

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