bad tires?
 

I've got a 2006 Sierra 2500HD with 2800 miles. Two of the load E range stock Bridgestone tires have developed a slight inward depression along the radius. I've seen this happen on tires before, but was always in the process of upgrading, so I just ignored it. I had a 93 S-10 with crappy Uniroyal stock tires that had the indent on every tire. However, I would like to keep the stock Bridgestones on the Sierra for a while.

Something to worry about? Thanks.