Dryer Drum Roller Abstract

Our clothes dryer seemed to be making some new possibly worrisome sounds lately.
One catastrophic part failure involves any of the four roller wheels that support the drum as it spins.
I could not examine one of the rear wheels closely except by a 3X telephoto image through the bowels of the dryer. .
We were very relieved to find it appears to be in good condition along with the other three wheels.
This photo is definitely my favorite of the day, as I was not looking forward to disassembling the dryer.