I found this excerpt from the Gravel Cyclist:
Cleats
A review wouldn’t be a review unless you do something you’re not supposed to do with a product. In the case of the Xpedo CXR pedals, I tried them with the supplied Xpedo cleats and Shimano SH51 SPD cleats. For the record, Xpedo CXR pedals are Shimano SPD compatible.
Top: Xpedo CXR Cleat, Bottom: Shimano SH51 Cleat.
Top: Xpedo CXR Cleat, Bottom: Shimano SH51 Cleat.
As expected, the CXR’s work flawlessly with Xpedo cleats. They were easy to engage and disengage.
Using the Shimano SH51 SPD cleat, the CXR’s were easy to engage, but often had a tendency to hang up at the front of the pedal during attempted disengagement. This is a point of concern. However, I figured a technique to ensure disengagement almost 100% of the time, but it is worth noting the CXR pedals work best with the Xpedo cleats.