1.   Coupled with heat-resistant rubber and support inserts in the sidewalls, the new tires are able to hold their shape when the tire deflates.

2.   It was later revealed a rear tire had deflated, causing him to spin and then become airborne when he hit a curb.

3.   The tires can easily deflate for transport.

4.   He left town under police escort, after the sides of his car were kicked in and its tires deflated.

5.   USAC officials said they would continue to work with tire manufacturer Firestone to determine what caused the tire to deflate.