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You probably have a broken steel/fiber ply belt in the sidewall. usually this is caused by two things, a manufacturing defect or an impact to the side wall (like hitting a pot hole). You should get the tire replaced quickly since it is a safety hazard and the integrity of the tire is compromised (thats why you get a bulge as it starts to lose shape). This might cause the tire to blow out.

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17y ago

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Q: What makes a vehicle tire bulge or lose shape?
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