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2. Bicycle parking rack - Wikipedia

   en.wikipedia.org/wiki/Bicycle_parking_rack

   A bicycle parking rack, usually shortened to bike rack and also called a bicycle stand, is a device to which bicycles can be securely attached for parking purposes. It may be freestanding, or securely attached to the ground or a stationary object, such as a building. Indoor racks are commonly used for private bicycle parking, while outdoor ...

3. List of bicycle parts - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_parts

   Pulley wheel: see Jockey wheel; Power meter: a device on a bicycle that measures the power output of the rider; Quick release: a skewer with a lever on one end that loosens when the lever is flipped. Used for releasing wheels and seat posts; Rack: a rack that attaches behind the seat, usually with stays to the rear dropouts, that serves as a ...

4. Paper car wheel - Wikipedia

   en.wikipedia.org/wiki/Paper_car_wheel

   Paper car wheels were invented by the locomotive engineer Richard N. Allen (1827–1890), [4] who set up a company with his brother-in-law in 1867, producing paper from straw. They dampened vibrations much better than conventional cast-iron railway wheels, which transmitted all imperfections of the track into the car above it, making train ...

5. Cycling - Wikipedia

   en.wikipedia.org/wiki/Cycling

   European city bike. Children riding a bike in Ghana.. Cycling, also known as bicycling or biking, is the activity of riding a bicycle or other type of cycle. It encompasses the use of human-powered vehicles such as balance bikes, unicycles, tricycles, and quadricycles.

6. Bicycle brake - Wikipedia

   en.wikipedia.org/wiki/Bicycle_brake

   Bicycle brake. Animation of a single pivot side-pull caliper brake for the rear wheel of a steel framed road bike. A bicycle brake reduces the speed of a bicycle or prevents the wheels from moving. The two main types are: rim brakes and disc brakes. Drum brakes are less common on bicycles.

7. Bicycle chain - Wikipedia

   en.wikipedia.org/wiki/Bicycle_chain

   Bicycle chain. Roller chain and sprocket. A bicycle chain is a roller chain that transfers power from the pedals to the drive- wheel of a bicycle, thus propelling it. Most bicycle chains are made from plain carbon or alloy steel, but some are nickel-plated to prevent rust, or simply for aesthetics.