You can buy one of those front sprocket sets that havetwo: one around 52 teeth and the other that has about 39 teeth (frommemory?). I have an old Huffy that started life as a six speed (or maybe7). I brought the sprocket set at the swap meet and put a five speedcassette on the back wheel. I had to add a few links to the old chain butwith friction shifters it works fine. If you could find the sprocket set,you can have a ten speed. Out of ignorance, I kept the front derailleurand it works fine