I orderd a 36T BMX sprocket from Ebay for $4.99. It was listed as a BMX sprocket. Anyway....the hole in the sprocket for one-piece crank, lines up perfectly and I drilled an additional eight holes for the mounting hardware. The sprocket works fine and cost wise...about 10% of other sprokckets I have found/used. Just a tip/idea for those looking for sprockets.