What percentage of American children live in poverty? According to the National Center for Children in Poverty, 16 percent of children (20 percent of children under age six) in America live in poverty. The child poverty rate in America is often two to three times higher than that of other major industrial nations. Poverty is defined as living in families with incomes below the federal poverty line ($21,200 for a family of four in 2008).
The main cause for tire cupping is worn suspension allowing too much freedom for the wheel to bounce and vibrate, specifically shocks/struts and bushings. If your wheels are going out of balance, this issue is greatly amplified.
There are several factors that cause a tire to become dry rotted. The environment the tire is exposed to, the age of the tire and the frequency of use will all contribute to this condition. Although the rate at which a tire becomes dry rotted can be slowed, eventually over time all tires will expire. The environment in which a tire lives in is mostly responsible for dry rot damage.