Freewheel - component on rear wheel to allow you to coast without pedalling Single speed - a one gear, freewheeled bike Fixie - a one gear bike that you can pedal back and forth Sprocket - aka gears Freehub - a freewheel design attached to the hub rather than being part of the gear cluster Cassette - a group of sprockets that goes on a freehub Dish - process of changing the tension on the spokes of a wheel to move the rim about the centre of the wheel. Rear wheels are typically asymmetrical in shape to allow for the gears on one side. Cranks - the arms that hold the pedals Bottom bracket (BB) - the component that allows the crank axle to turn in the frame Chainwheel - the sprocket attached to the cranks
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