Stranger strangergram sprocket oil slickthe strangergram is a standard style sprocket compatible with alll non socket drive cranks and is supplied with reducer tophats strangers strangergram sprocket is sure to cause a stir features construction 3d pentagram style custom design fully cnc machined from aircraft grade 6061 t6 alloy weight80gbuystranger componentsfrom chain reaction cycles the worlds largest online bike store