On one of my fuel stops on my recent trip back to TX and OK, I felt a weird vibration on landing, and it turned out that a chunk of the rubber from the tailwheel had broken loose. There had always been a defect in the rubber from the time the tailwheel was new, but I thought it was cosmetic. It lasted over 8 years and nearly 500 hours of flight time though, so I can’t complain too much.
In the meantime though, FlyBoy Accessories started selling this 4″ lightweight tire that is 13.5oz lighter than the 5.5″ tire above. That moves my CG an additional 0.13″ forward which should further help with the aft CG issue I’ve always had.