Sidewall – CBU Due To Cut Or Shock Condition of damageCarcass cords are broken up at shoulder and / or sidewallCauses1. Bad distortion or pinching between object and wheel(tire)2. Hard hit against the object3. Low inflation pressure4. Low aspect ratio tire is more likely to get CBU RecommendationsStop to use the damaged tire1. Drive carefully to avoid obstacles. If the obstacles cannot be avoided, reduce the speed2. Check tires frequently, and remove foreign materials between the duals3. Use tires under the recommended air pressure and load Examples