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.
What Is Tire Speed Rating? A tireâs speed rating indicates the optimal speed that the tire can safely maintain over time. In short, itâs the fastest speed a tire can handle before it no longer performs as designed. The higher the speed rating, the better control and handling youâll have at higher speeds. The speed rating system was developed to help control the safe performance of tires at standardized speeds. A tireâs certified speed rating is given a letter from A to Z, ranging from 5 km/h (3mph) to above 300 km/h (186 mph). This rating system (see below) shows the top speed for which a tire is certified.