Can a tire with tread worn down to the wear bar still be legally used on the road?

A tire worn down to the wear bar typically indicates that the tread depth has reached a level where it no longer provides adequate traction or responsiveness, especially in wet or slippery conditions. The wear bar serves as a visual indicator that the tire has reached its minimum legal tread depth, which is crucial for maintaining safety on the road. Using tires in this condition increases the risk of hydroplaning and can significantly impair braking performance, making it unsafe for driving.

Legal regulations often specify minimum tread depths for tires, and once the tread has worn to the wear bar, the tire is considered to be at or below that legal threshold. Consequently, it is deemed unsafe for road use, as it does not meet the safety requirements necessary for effective vehicle operation.