Fixie Bikes
A fixed-gear bike (or fixed-wheel bicycle, commonly 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.
The sprocket is screwed directly onto a fixed hub. When the rear wheel turns, the pedals turn in the same direction. This allows a cyclist to stop without using a brake, by resisting the rotation of the cranks, and also to ride in reverse.
Track cycling in a velodrome has always used fixed-gear track bikes, but fixed-gear bikes are now again used on the road, a trend generally seen as being led by bicycle messengers.
Recently, fixed-gear bikes have emerged as part of the hipster trend due to their appeal as a "vintage" accessory.
