spoon lug nuts
 

anyone know if the spoon lugs will work on most aftermarket wheels?

i bought a set and noticed they have a bulge seat and not a tapered seat like most other aftermarket lugs.

A bulged or radiused seat lug nut will only make a single circular line contact with a straight tapered wheel lug nut seat. This would be a bad thing as they would want to loosen.
The opposite situation(straight tapered lug nuts in radiused openings) will only make line contact at two diameters (also bad).

The lug nut shape should match the wheels.