High Quality Content by WIKIPEDIA articles! A fixed-gear bicycle (or fixed wheel bicycle) 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 the 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 bicycles are now used on the road, a trend generally seen as being led by bicycle messengers.