Et la réponse de MKS pedal
Hello Francis,
Thank you for contacting MKS.
Our QR pedals come in two series: the Panamax pedals belong to the Ezy Superior and the US-S to the Ezy.
They are not interchangeable as they have different shaft diameters and groove positions.
Ezy Superior:
https://www.mkspedal.com/?q=en/product/term/3
Ezy:
https://www.mkspedal.com/?q=en/product/term/4
The problem you are facing is due to correct product specifications.
Thanks, regards,
Kenta Yubamoto
MKS Pedal