- Internal combustion/steam hybrid from BMW -- The powertrain is retrofittable into existing vehicles, down to a 4-cylinder 3-series
- French company Osmos "reinvents the wheel" -- hubless "orbital" wheel offers numerous advantages, they claim
- Peugeot shows off two-seater electric "city car" concept -- you enter and leave through the center of the hubless wheels
Some of these may be old. But they're still cool.
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His versions of this concept use an $8000 helicopter main rotor bearing. So, I hope these guys source some cheaper parts.
-Ogre