Product review (5 stars): Dryer drum now rotates properly
Our dryer drum was stalling out with heavy loads. I thought the belt needed replacement, but it turned out to be fine. These inserts (2 required) are what the front of the drum rests on, and the old ones were worn. Replacing them, along with cleaning out all the accumulated lint from the sliding surfaces on the front and back of the drum fixed the problem. The only down side ... you have to turn the dryer face down (on a blanket) and completely disassemble it from the back.