fixie

Death Pedal is a fixed-gear freestyle(trick) film filmed over the past couple of years. It features rider profiles on Ines Brunn (Germany), Dre Reyes (Phillipines), and Kareem Shehab. The video also features sections on San Diego CA, Phoenix AZ, and Seattle WA as well as montages featuring footage from San Francisco, Atlanta, Peru, Beijing, Singapore and Malaysia. Kareem has traveled all around the globe filming for this project and has been fortunate enough to film with the best fixed-gear riders in the world. This is first film to have a truly global perspective on fixed gear freestyle.

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definiciones
fixie, piñòn fijo , es decir que frena con contrapedal ,tambièn hay fixed gear , es decir que tiene un solo piñòn, lo que no tienen es cambio convencional ninguna de las dos , a lo mejor hay que definir cada cosa
Fixed-gear bicycle

In Australia, "fixed-wheel" is the normal term for the subject of this article — meaning the opposite of freewheel, and "fixed-gear" usually refers to a single-speed bicycle.

A fixed-gear bicycle (or fixed-wheel bicycle, sometimes known in the USA as a fixie) is a bicycle that has no freewheel, meaning it cannot coast — the pedals are always in motion when the bicycle is moving.
http://en.wikipedia.org/wiki/Fixed-gear_bicycle

SS single speed bike bici de una sola velocidad , pero puede tener un sòlo piñòn y tener un cambio rohloff con lo que tiene màs velocidades..
http://en.wikipedia.org/wiki/Single-speed_bicycle
si tiene freno no puede ser fixie ( fixed wheel) porque las fixies frenan a contrapedal..pero sì fixed gear o no !dependiendo de si no tiene cambio o sì
en fin un lìo..