What Is a Social Security Number (SSN)? A SSN is a nine-digit identifying number is in the format xxx-xx-xxxx. Any individual who is a U.S. Citizen, a permanent resident, or a temporary alien resident who is authorized to work in the United States, must have a SSN.
The most common cause of a flat tire is puncturing of the tire by a sharp object, such as a nail, letting air escape. Depending on the size of the puncture, the tire may deflate slowly or rapidly.
However, if you put a really â¦ wide tire on a wheel that is too narrow, you are going to cause the tire to crown-which means instead of having that flat racer-style look, it's going to have a rounded balloon look to it. This will give you less traction and uneven wear. The same applies when going to a narrower tire.