You could say Peter Varga's brain works in cycles, as the Slovakia-based designer has been rethinking pedal-powered vehicles since his design-school days.
His Citycle concept is a hubless update to the cyclo, the trike format widely used in Vietnam, and it garnered Varga 8th place in 2006's International Bicycle Design Competition;
Varga's Masters Degree project from 2007 folds up in about two seconds and won him a Slovak National Prize for Design;
His most recent project, the Oneybike, resembles a velocipede when folded up, then unfurls in seconds to form a recumbent fixie. It won a Merit Prize in the 2009 International Bicycle Design Competition.
Check out more of Varga's stuff (under the name Petov Design) here.