Yes, its a Joseph Kuosac 9-28 Capreo based cassette. They make wheels and lots of aftermarket stuff for small wheel bikes. They do a 10 and an 11 speed cassette for a capreo free hub. I have the 10 and its nothing but misery so far . I have a feeling there is a simple solution somewhere and have written to them for help. Let me post a photo of the cassette. Here is a photo of the shortened chain as well showing the derailleur a little higher.