i remember when tire dealers tried to sell that as an add-on. Fortunately (or unfortunately for me) that is not done much anymore, and mostly for racing tires now. I think that the manufacturing process has improved so that it is no longer needed. It is not available here in SG or home in Anacortes (I thought about bringing the damaged tires home) but was not sure that I could actually have the process done? There are some youtube videos on-line about the process. Interesting, but old-world. . . it takes a real technician, and also specialized adapters for new tire sizes that not everyone has.