Originally Posted by Leester

The problem is not camber. It is the construction of the tire. First it is beltless and second it has a very inexpensive foam insert. Using traction compound softens the tire and penetrates through to the insert. Once the tire and insert get soft the lateral pressure from hard cornering pushes the tire inward and creates the "death groove". The foam starts to expand as the tire softens and because it's beltless and there is nothing to help keep the tire's original shape the tire's OD starts to balloon. Now you know why they are so inexpensive