Topic: National Automotive Sampling System

This March 18, 2015 photo shows the load index, 140/137, and speed rating, M, on a popular size semi-tractor trailer tire, at a truck tire shop in Houston. The M speed rating indicates that 81 mph is the maximum speed at which this tire can carry a load weighing 5,512 pounds at the recommended air pressure. (AP Photo/David J. Phillip) (AP Photo/David J. Phillip)

Federal regulators alter tire crash data

Eli Wolfe - FairWarning