People Who Suffer Depression And Anxiety After A Traumatic Brain Injury May Have Damaged White Matter. Jun 16, 2015 12:00 AM By Ed Cara @EdCara4. Researchers from the University at Pittsburgh Medical Center may have figured out why people suffer depression and anxiety after a concussion.
How to Read Speed Rating, Load Index & Service Descriptions. Using a P195/60R15 87S tire size as our example, the 87S at the end of the size represents the tire's service description. A service description identifies the tire's load index and speed rating.
The U.S. Department of Transportation (DOT) set the ratings scale, shown below. 1  But tire makers test their own tires and assign their own speed ratings. On the sidewall of every tire, you'll find one of these speed rating codes: 2  M - Up to 81 mph. 3  N - Up to 87 mph. 4  P - Up to 93 mph. 5  Q - Up to 99 mph. 6  R - Up to 106 mph. 7  S - Up to 112 mph.