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.
Aggressive off road tires chop more easily. Alignment problems will cause inside and outside tread wear on the tire but not in top tread and not necessarily chopping. Under inflated tires will wear both outsides of the tire tread. Over inflated tires will wear the inside the tire tread.