The left front tire is worn on the inside tread only; the right front tire shows no abnormal wear. Which angle is most likely the cause?

The reason for the left front tire exhibiting wear exclusively on the inside tread can be attributed to camber angle. When the camber is excessively negative, the top of the tire leans inward towards the vehicle. This configuration causes the inner portion of the tire to make more contact with the road surface during driving, leading to accelerated wear on the inside tread.

In this scenario, the right front tire shows no abnormal wear, indicating that its alignment angles, including camber, are within acceptable limits. This discrepancy confirms that the left tire's abnormal wear pattern is likely due to a negative camber issue. Proper adjustments to the camber angle can help ensure even tire wear and improved handling characteristics of the vehicle.