So I have a pile of old sorex and takeoffs mounted from a long time ago. They sat in my tool box for a number of years. The rubber and wheels still look perfect. On a few pairs however, they were stored so they were sitting standing up, creating a flat spot on one patch of the tire. Is this something I can run? Will the flat spots come back out? Maybe practice but not for racing? or are they garbage?
Take a hair dryer or heat gun to them. I done this for off-road foams to get out the creases from being in the package. I don't know if the inserts in your tires are foam though? I dunno. But it might work.