2/32nds or 4/32nds? It's the degree of safety that needs to be discussed

摘要

Driving on a tire with 2/32nds-inch tread depth is safe. Driving on a tire with 4/32nds-inch tread depth is safe. That seems to be the consensus in our industry. The federal government only requires that tread wear bars be placed at the 2/32nds-inch wear mark. It's up to the states to set a minimum tread depth standard, and not one of the 50 states has a standard higher than 2/32nds-inch.