Otherwise, a purchaser might get a casing prone to failure. If municipalities retread their own casings, they should use casings that have been properly inflated throughout the tire's life. The quality of retreads has increased greatly. Ten to fifteen years ago, there were close to 10,000 retread shops, today there are around 1,350. The huge decrease can be attributed to the fact that many were not doing a good job.
Commercial shops can retread almost any tire.
Even though it isn't economical to use retreads on an automobile, the use of retreads on trucks and heavy equipment can amount to huge savings for municipal departments.