Staff Answer
Jul 06, 2026 - 10:41 AM
Thanks for the question, the CURT CrossWing is designed for use with rigidly mounted pin boxes. CURT specifically advises against using articulating pin boxes, such as the Lippert Rota-Flex, Flex Air, Trailair Air Ride, or Helux, because those pin boxes introduce additional movement that the CrossWing is not designed to accommodate.
Most MORryde rubber pin boxes are rigidly mounted and use an internal rubber shear spring to absorb road shock, rather than allowing the king pin to articulate. Those models are generally considered compatible with the CrossWing.
To be certain, we would need to know which MORryde pin box model you have (for example, the part number from the identification sticker or a photo of the label).
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