What is the main function of tread grooves in tires?

The primary function of tread grooves in tires is to channel water away from the tire's contact patch with the road, which significantly improves grip and traction, especially in wet conditions. This design feature helps prevent hydroplaning, where a layer of water between the tire and the road can lead to a loss of contact and control. The grooves create pathways for water to escape, ensuring that the tire maintains better contact with the road surface, thereby enhancing safety and driving performance in adverse weather conditions.

While other choices may suggest different benefits, they do not accurately reflect the critical role that tread grooves play in maintaining optimal tire performance and vehicle safety.