What are the different purposes and limitations of wheel balancing, wheel alignment, and tire-condition inspection when investigating vibration?

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Hello, these checks serve different purposes, so successful balancing alone does not rule out other causes of vibration. Wheel balancing corrects uneven weight distribution in the tire-and-wheel assembly using balancing weights, addressing vibration caused by that imbalance. Wheel alignment adjusts wheel angles to the vehicle manufacturer’s specifications, helping with pulling and uneven wear; it does not correct mass imbalance. Tire-condition inspection looks for uneven wear, flat spots, and bulges, but a visual check alone cannot establish how the assembly behaves under load. If vibration persists, I would ask the shop to check wheel fastening and mounting, measure wheel runout (deviation from true rotation), and consider a loaded-roller road-force check for tire irregularities that ordinary balancing can miss. Describe when the vibration occurs, particularly whether it depends on speed or braking, so the mechanic can investigate steering, suspension, or brakes as appropriate. A tire bulge needs immediate specialist attention and replacement. If steering vibration starts suddenly, stop as soon as it is safe and call for assistance.