So I randomly bought an old skip tooth sprocket and crank off ebay the other day. Just got it here today. I thought about using it on my new project, but I'm not really sure I can. I had no idea how large those sprockets were! It's half again as big as a normal cruiser sprocket. I'm guessing you can get some major speed with one of these things. As you can see I know nothing about old bike parts. I'll post a pic of it tomorrow. And if I can't use it I'll post that too. Maybe someone here would be able to.