I just purchased a cruiser bike online that I had to assemble. When I rode it for the first time, I notice my pedals felt shaky, whether pedaling or coasting, and when I did pedal every few seconds ...
The plates and connectors on my old quill pedals "move around" in relation to the pedal axle itself: In the photo below, I'm pushing the pedals to opposite sides to show how the pedal cage "distorts". ...
I ride very old Ritchey Logic pedals (model year ~1998), with original cleats (look like the red ones below): Since those have long been out of stock, I'd like to buy newer ones, the Logic V4 Comp, ...