I have a project where I need to chain drive a 21" wheel. Low horsepower type thing. I don't really wanna lace up a 21" rim to a rear hub because its a low buck type thing. So I am proposing drilling a sprocket to fit the studs that the spoke flange on about a 1980 model wheel attaches with. These are four M6 studs. I do not have a wheel on hand yet, but does anyone see a glaring issue with this?