Good friend is looking for a good used set of 21x29 tires for a Bucyrus erie scraper. It is only used for 10hrs a year at a show. The rear two he has have rotten sidewalls. Cant justify $7000 each for two new ones.
I would try a tire dealer that does heavy equipment .they may not have them on hand but could keep an eye out for some . Explain what you need them for.
We have been calling and knocking on doors. Just thought I would see if by chance someone may have one or two.
Auburndale tire recycling used to let people go through their piles, and they had a lot of big tires stockpiled, probably harder to shred than a car or tractor tire. If you ever get through central WI it would be worth a stop.
Thanks Delmer, Called Liberty tire and they don't have anything that size. But he is on the hunt also, calling his connections.