A unique last mile solution, the German-designed Halbrad (that's "Halfbike" in English) packs the two wheels, pedals and handlebars of a bicycle on a reengineered rear triangle. This half-bike ...

Where most other bikes would have a rear triangle consisting of straight seat stays, chain stays and a seat tube, the RoundTail simply has two shock-absorbing joined rings. Tortola came up with ...

Its main triangle is one-piece, promising better rigidity (and safety). The front and rear portions of the bike — the fork and rear triangle — pivot on helical hinges and swing into place to ...

Evan Solida’s Rael is yet another concept bike, although this one doesn't dicker with the time-tested double-triangle frame ... giving you a digital rear-view mirror. The part you do see ...