Lunartic by luke douglas from uk
designer's own words:
What? Lunartic is a compact urban bicycle concept exploring the unique combination of different wheel sizes, a toothed belt drive and hubless rear wheel. Lunartic places itself in a niche between existing bicycle solutions; compact without folding, easy to ride and handle, stylish and comfortable
Why? The gyroscopic effect of a large wheel helps it travel faster and more contact with the road provides a stable and comfortable ride, whereas small wheels save space, weight and are more maneuverable. Belt drives are clean and maintenance free and a hubless wheel creates a whole new space, as well as an intriguing aesthetic.
How? The combination of these features is a new balance of ride quality, space saving, style and convenience. Moving the working parts back, inside the rear wheel shortens the wheel base but maintains large wheel performance. There is no sacrifice to conventional or efficient geometry apart from a low center of gravity and stand over height.
Video of working prototype available at:
http://www.youtube.com/watch?v=cPsY2NfPJtw
Lunartic – A compact urban bicycle with hubless rear wheel, belt drive and different wheel sizes
A side view shows Lunartic’s space saving qualities, with working parts back inside the rear wheel, unique look and conventional geometry
The unique working prototype proves the concept can work and is the first step in developing the design into a commercial product