1. GrassHopper fx – Folding Bicycle

[via HP Velotechnik]

2. YikeBike

[via YikeBike]

3. Urban Street Bike

[via Cube]

4. a-bike

[via a-bike]

5. Wooden Bike

[via CNET]

6. Ville – Bike and Shopping Cart by Hyuk Jae Chang

[via Coroflot]

7. Variable Frame Bike by Daniel Knuepfer & Stefan Wallmann

[via Yanko Design]

8. i-Bike by Reindy Allendra

[via Behance]

9. Forkless – Cruiser by Ollie Erkilla

[via Ollie Erkilla]

10. Velorian recumbent trike by Mantas Palaima

[via Behance]

11. Nulla Bike by Bradford Waugh

[via Bradford Waugh Design]

12. Sideways Bike by Michael Killian

[via Sideways Bike]

13. IF-Mode Folding Bike by Strida

[via Amazon]

14. Locust Folding Bike by Josef Cadek

[via Coroflot]

15. Dreamslide Bike – Bike without a seat

[via Dream Slide]

16. Electric Bike Concept ver2 by Yuji Fujimura

[via Coroflot]

17. Taga – the bike that transforms to Baby Stroller when needed

[via Taga Bikes]

18. OneyBike – a retro bike

[via Petov Design]

19. “Gismo” – Rocket Powered Bicycle

[via The Rocketman]

20. Walking Bike

[via Its Not Bad at All]

21. OKES lifestyle bike by Reinier Korstanje

[via Behance]

22. Eco 07 by Victor Aleman

[via Behance]

23. Shocker Chopper by Team Tentakulus

[via Behance]

24. KölnDesign BoomBike by Team Tentakulus

[via Behance]

25. V-Bike by Federico Weber

[via Behance]

26. Lisboa Bike by Pedro Machado

[via Behance]

27. Wooden Bike by Jan Gunneweg

[via Jan Gunneweg]

28. PLUMA TRACK BIKE CONCEPT by Nuno Teixeira

[via Behance]

29. Bicycle by Felix Fridman

[via Behance]

30. Hybrid City Bike by Peter Dudas

[via Behance]

31. Wobblebike by Wobbly John

[via Instructables]

32. Bison Bike

[via Neatorama]

33. Double-Sized DIY Bike

[via GearFuse]

34. Shift bike for beginner by Matt Grossman

[via I New Idea Homepage]

35. SeeSaw Bike by My Atomic Mass

[via My Atomic Mass]

36. CouchBike

[via Bike Forest]

37. Office Chair Bike by Wooden Bikes

[ via Instructables ]

38. Trike Design by Sergio Garcia

[via Sergio Garcia]

39. Taller Bike

[via Kordite – Flickr]

40. Weird Bike

[via kristi_t – Flickr]

41. Square-wheeled bike