RING - SIDE 4.00/6.00-9 (Mitsubishi MB0909303)

MB0909303: A damaged retaining ring can allow a tire to separate from its wheel assembly during operation. This aftermarket replacement part references Mitsubishi as the OE maker and carries the cross-reference part number MB0909303. The retaining ring functions as a mechanical lock that holds the tire bead securely against the wheel rim. If the ring fails or is missing, the tire may lose seating pressure and suddenly deflate. A common usage context is on solid or pneumatic tires where the ring must withstand constant flexing and road shock. Verify the serial number or application, then call (562) 693-7748.

Part number variants: MB0909303, mb0909303