Ironically just repaired my samsung dryer. Two drum felt gaskets, and the belt since it was disassembled. Front gasket failed and tore out. After examining all components, the torque of belt drive pulls on one side of drum, this puts extra pressure one one set of the drum rollers (Rh side). The rear one is near the hot air duct so it gets more extreme working conditions. bearing has worn shaft slightly and plastic wheel was partially fatigued, so looks like that rollet was dragging and so belt pulls down more front of drum pinching seal from extended weight and torque. The paint was worn off the housings in this section so felt gasket had more friction in that zone. The rear roller near the heating generator duct is a bad design. especially since it hangs off the back housing which is quite flexible in that area. Thankfully the repair was simple, other than completr disassembly , but not convinced it will last long.