Originally Posted by
Carbonfiberboy
It's odd how few have proper slots now. The straps have to be leather.
Classic quill pedals had that shape to mesh with slotted cleats. Since high-performance applications have basically totally moved to clipness, there's near-zero demand for cleats with toe clips. Since there's no cleats, there's no reason to design the pedals to mesh with them.
Lots of old quill pedals are still out there in great shape, though.