New data released by the U.S. Department of Commerce's Bureau of Economic Analysis (BEA) shows that outdoor recreation generated $862 billion in economic output and 4.5 million jobs in 2021.

“The study of tread wear is as important to a mechanic as the study of fingerprints to a detective.” So wrote SAE engineer Ed Packer to open a February 1959 Hot Rod technical article about interpreting tire tread wear. By “watching your treads,” Packer stated, “you can keep your roadster or family...