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Is there any solution to fix this problem or do u have to replace the whole tire

 
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I have the same thing on the sidewall of my Nitto NT-450's, I hit a pot hole or something too hard. The only way to fix it that I know of is to replace the tire unfortunatly.

 
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Its called an impact seperation. It is VERY dangerious and can cause a blow out, you need to have that tire replaced. There is no way to "fix" it other than a new tire and you should have it replaced as soon as you can find a tire shop. If you bought them from an acutal tire store you may have purchaced a road hazard replacement warranty I know that discount tire has one with every tire sold but check on that and get it replaced.

 
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Sorry to say, but you have to replace your tire. You have an impact bubble because you hit a pothole or something in the road.