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ferris wheel, a bicycle, a screw and a doorknob ferris wheel, a bicycle, a screw and a doorknob
A bicycle is both.
The wheel, and many other things a bicycle is a compound machine
The rear wheel has a different hub; the gears attach to it. Alternatively the rear hub has gears or a brake or a dynamo built into it. The front hub will sometimes have a dynamo built into it, other than that it is just a plain hub.
Depends on make and model of bicycle
A bicycle tire is a tire which fits on the wheel of a bicycle or similar vehicle.
Unicycle = 1 wheel. Bicycle = 2 wheels. Tricycle = 3 wheels.
A bicycle fork is the portion of a bicycle that holds the front wheel and allows the rider to steer and balance the bicycle.
wheel+wheel=bicycle
Wheel and axle.
A bicycle
swirly chairs