going back to a discussion about f1 tyres being recycled, apparently they’re used as fuel at a cement factory near hq at didcot...
https://www.autosport.com/f1/news/14...a-cancellation
tyres, particularly racing ones are really only designed to be mounted once to a set of rims. the more you take them on and off the more you change the structure and risk damage. so it makes sense that they’re taken off and recycled immediately.