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 speed rating is described on the tire sidewall. Many tire manufacturers currently include the speed symbol in the tire size description. Example: P225/70 H R15 Speed Symbol. In this example the H indicates that the tire is capable of sustained speeds up to 130 MPH.ires certified for Z speed ratings (top speeds over 149 MPH) will continue to be identified by including the speed symbol in the size designation since the top speed for a Z rated tire is determined in accordance with the manufacturer's vehicle specifications.