a)the tire is properly inflatedb)the tire is overinflatedc)the tire is underinflatedd)none of the above
C; Underinflated, A the proper pressure puts the entire tread down B like a balloon the higher pressure the more rounded which means the center of tread is supporting the car.
C) The tire is under inflated. The tire walls are thicker and stronger than the radial section (the part with the tread) With the case of an under inflated tire the outer edges will be doing all of the grip, not because of the inflation available, but because they are rigid and attached to the wheel itself. the center of the tire is a soft spot by comparison so it tends to bubble up and take very little road stress.
The tire is underinflated. Underinflation makes the tire contact the road at a wider patch, but also softens the tire and makes it fold so that the center of the tread is lifted from the road. The result is that the grip of the tires is based mainly on the shoulders or corners of the tread. The shoulders are less grippy, less good in channeling out water on a wet road, and are thicker and thus generate more heat. The net result is a greatly increased wear and lesser grip in all direction -- primarily while braking.
