How about steam power?
(http://upload.wikimedia.org/wikipedia/commons/thumb/7/72/Dampf-Fahrrad_2.jpg/746px-Dampf-Fahrrad_2.jpg)
Found it here...
http://commons.wikimedia.org/wiki/Image:Dampf-Fahrrad_2.jpg
I see oil hit 140.00 today.
Might see a lot of stram this summer/ c*
... and yet another (more conventional)
(http://www.spookytoothcycles.com/images/dresser_black/Pic_7748web.jpg)
http://www.spookytoothcycles.com/content/view/144/1/
I like that steamer, Don.
ome brewed weedwacker powered bike
http://www.youtube.com/watch?v=uruaRsCHvk4