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2. Shaft-driven bicycle - Wikipedia

   en.wikipedia.org/wiki/Shaft-driven_bicycle

   A shaft-driven bicycle is a bicycle that uses a drive shaft instead of a chain to transmit power from the pedals to the wheel. Shaft drives were introduced in the 1880s, but were mostly supplanted by chain-driven bicycles due to the gear ranges possible with sprockets and derailleurs. Around the 2000s, due to advancements in internal gear ...

3. Stringbike - Wikipedia

   en.wikipedia.org/wiki/Stringbike

   The mechanism has a rocker arm [5] [6] on each side of the bike that replaces the round sprockets (which are usually only on the right side) on chain driven bikes. In contrast to traditional derailleur chain drives, the drive does not slip when changing gears, [7] and the gearing can be changed even when the bicycle is almost stationary.

4. Strap wrench - Wikipedia

   en.wikipedia.org/wiki/Strap_wrench

   A chain whip is a tool used to tighten and loosen threaded sprockets on a bicycle. It is called a chain whip because it has a short section of chain used to grip the sprocket. An alternative method to tighten sprockets is the rotafix method, which uses no tools.

5. Famous, nearly 100-year-old Coney Island roller coaster shut ...

   www.aol.com/news/famous-nearly-100-old-coney...

   Operators shut down the Cyclone, Luna Park's 97-year-old wooden roller coaster, as it was climbing up to its famed drop because of a damaged chain sprocket in the motor room, according to the ...

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7. Continuous track - Wikipedia

   en.wikipedia.org/wiki/Continuous_track

   Modern tracks are built from modular chain links which together compose a closed chain. The links are jointed by a hinge, which allows the track to be flexible and wrap around a set of wheels to make an endless loop. The chain links are often broad, and can be made of manganese alloy steel for high strength, hardness, and abrasion resistance. [42]