noticing a problem with my front right side, dunno what it is

[H3 Hummer]

I had a similar noise on my H3. When you drive slowly next to cars it is real noticeable. Like something is popping around. Since I first heard it right after off roading I thought I might have busted a ply in the tire or something. There were no bulges and about 100 miles later it went away. Never found out what it was, but it didn't get any worse.