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This is a new type of bike. I call it a "bipedal-speed". It has two single-speeds, similar in spirit to the flip-flop hub, the dinglespeed, and the retro-direct drive. Like the retro-direct, it can shift in real time. However, it's designed to be sturdier, for BMX applications.

The ultimate goal is to build a hybrid bike that can be used 5% of the time for BMX skateparks, and 95% of the time for urban commuting.