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It just started happening recently, but when I drive now I hear the either of the rear tires, I think its the left start to make noises when I roll. I sounds as if there is a bump on the tire or something. I'm running 205/40/17 Kumho Ecsta Supra 712's. I check the tires and they look perfectly fine, no bumps or nails or anything. I just hear the noise inside of the car, slowly when I accellerate and pretty loud when I'm on the freeway. No I haven't hit any curbs or anything, however I do hear that Kumho's get pretty loud after about 30K miles. Maybe its time to rotate them again.

Any ideas?

 
Rep Power: 280

Could be a seperated tire......have a tire shop look at them, I've seen a few Kumho's lately with flat spots and seperation.

 
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What is a separated tire?

 
Rep Power: 333

are they evenly wearing?

 
Rep Power: 327

A separation hapens when the belts of the tire separate from each other. Usually caused from VERY hard impacts. But can be caused from poor manufacturing of the tire. Sometimes air can get into the separation and you will see a bubble on the outside of the tire.


Here is an impact separation




Here is a tread seperation

 
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Hmm... I don't think its either tread nor impact separation. My tires seem really healthy, still a lot of tread left.

After I got my car lowered I got a camber kit installed and had the rear set to -.5, so it started eating at the inside of my tires (but not bad). Then a few months ago I got the tires flipped inside out (b/c they're rotational) so they'll evenly wear.

The problem could possibly be flatspots? (I only drive my car once every 2 weeks b/c I'm in college and those are the only times I go home to get my car. I think I need to do tire rotation too.

Spring Break is next week, so I'll be installing my kit, new oil change, rotating tires, the whole 9 yards. I'll have a tire shop look at it. Thanks guys.

 
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Check Your Disc Brakes!

 
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Yeah, that sounds like a great idea! But, wait, I don't have rear disc brakes!