Its an American 3 speed. It uses odd parts and poor construction. I'd ride it as it is, I got a Raleigh 3spd +big basket I shop with. But this isn't conversion material. It has US 26 1 3/8 wheels, a chain line that probably won't match that of a flip flop hub, and sadly those fenders won't hold 700c wheels. Sarah if you want a fixed cruiser, find a 700c wheeled hybrid. It'll have comfy geometry and will convert very easily. You'll need wheels and new bars. Converting this 3 spd will be a death march.