About Fixed Gear Bicycle
A fixed-gear bicycle (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 fixie-specific 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.
Riding fixed is considered by some to encourage a more effective pedaling style, which translates into greater efficiency and power when used on a bicycle fitted with a freewheel.
When first riding a fixed gear, a cyclist used to a freewheel has a tendency to try to coast now and again, particularly when approaching corners or obstacles. Since freewheeling, or coasting, is not possible, this can lead to anything from a ‘kick’ to the trailing leg, up to a loss of control of the bicycle.
Riding at speed around corners can be difficult for the novice rider, as the pedals can strike the road, resulting in a possible loss of control.
Without gears, fixed-gear cyclists cannot shift into more advantageous gears for steep climbs.
Some fixed-gear riders think brakes are not strictly necessary, and brakeless fixed riding has an almost cult status in some places, based on the perception by some riders of the experience of riding in a state of intense concentration or ‘flow’ where brakes are thought not to be needed.
Other riders dismiss riding on roads without brakes as an unnecessary affectation, based on image rather than practicality. Furthermore, riding brakeless can be very dangerous, and may jeopardize the chances of a successful insurance claim in the event of an accident and, in some jurisdictions, is against the law.
It is possible to slow down or stop a fixed-gear bike by resisting the turning cranks, and a rider can also lock the rear wheel and skid to slow down or completely stop on a fixed-gear bicycle, a maneuver sometimes known as a skid stop. It is initiated by unweighting the rear wheel while in motion by shifting the rider’s weight slightly forward and pulling up on the pedals using clipless pedals or toe clips and straps. The rider then stops turning the cranks, thus stopping the drivetrain and rear wheel, while applying his or her body weight in opposition to the normal rotation of the cranks. This action causes the rear wheel to skid, which acts to slow the bike. The skid can be held until the bicycle stops or until the rider desires to continue pedalling again at a slower speed.
貝哥哥指南 對 Fixed Gear Bike 的簡介。
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