Originally Posted by unkchunk

I stopped using tire liners a few years ago because of the very same thing. I lived in Orlando then, so maybe it's the Florida heat that makes the plastic compounds bittle and fracture. Can't recall the time line between original purchase date and the time I started getting the liner caused flats. But I figure if a product starts causing the very problem it's supposed to prevent, then it's time to put it in the trash.