Which of these factors may cause rapid wear of the tires on the front wheels of a passenger car?

Incorrect suspension geometry, especially poor wheel alignment (toe), is the main cause of accelerated and uneven tread wear on the front tyres. This causes the tyre not to roll straight but to be partially scraped against the road surface, which is visible as wear on its inner or outer edge. Poor geometry also worsens the vehicle's steerability and increases fuel consumption.