I was warned in reviews that the box you ALWAYS ship these in is too small so some of the treads are permanently  bent.  But the ones that were not too bad are great.  I did wash them as suggested first but it did not solve the problem.  Not sure why a company as large as yours can't use a box to fix the product. Especially since they are so expensive in comparison to ones from other companies.  They have done a great job and I am (mostly)very happy with them.