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2. List of bicycle parts - Wikipedia

   en.wikipedia.org/wiki/List_of_bicycle_parts

   Chain tensioner: a device to maintain proper chain tension; Chaintug: a device to aid in setting the proper chain tension; Cluster: a bicycle cogset, either a freewheel, or cassette; Cogset: the set of rear sprockets that attaches to the hub on the rear wheel; Cone: holds bearings in place, pressed against the cup; Cotter: pin for attaching ...

3. Velocipede - Wikipedia

   en.wikipedia.org/wiki/Velocipede

   While so traveling one evening, he discovered a break in the track, and flagged down a night freight train, thus preventing a possible accident. [8] The railroad rewarded his efforts by bankrolling his invention. [8] George Sheffield obtained the patent for his device in 1879, calling it a "velocipede hand car."

4. Bicycle drivetrain systems - Wikipedia

   en.wikipedia.org/wiki/Bicycle_drivetrain_systems

   A chain drive and rear derailleur gear change, the most popular system in use today A shaft-drive with crankset and rear gear hub. Bicycle drivetrain systems are used to transmit power on bicycles, tricycles, quadracycles, unicycles, or other human-powered vehicles from the riders to the drive wheels.

5. Crankset - Wikipedia

   en.wikipedia.org/wiki/Crankset

   A narrow wide chainring has teeth which are shaped differently for every other tooth. They are the same viewed from the side of the bicycle, but from the front or rear, one tooth is wide and the next is narrow. The pattern continues, narrow wide narrow wide, hence the name. The purpose is to prevent the chain coming off the chainring.

6. Chain tool - Wikipedia

   en.wikipedia.org/wiki/Chain_tool

   A typical chain tool. With a chain placed on the central sprocket, the screw is turned until a pin is pushed from the linkage. A chain tool is a small mechanical device used to "break" a bicycle chain in such a way that it can be mended with the same tool. A bicycle chain has links and plates that are pinned together; these pins can be pushed ...

7. Derailleur - Wikipedia

   en.wikipedia.org/wiki/Derailleur

   Campagnolo Super Record rear derailleur (1983) Shimano XT rear derailleur on a mountain bike Pulley wheels for a rear derailleur The rear derailleur has two functions: it moves the chain between rear sprockets while taking up chain slack caused by moving to a smaller sprocket at the rear or a smaller chainring by the front derailleur.