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2. Bottom bracket - Wikipedia

   en.wikipedia.org/wiki/Bottom_bracket

   Bottom bracket bearings fit inside the bottom bracket shell, which connects the seat tube, down tube and chain stays as part of the bicycle frame. The term "bracket" refers to the tube fittings that are used to hold frame tubes together in lugged steel frames [ 1 ] which also form the shell that contains the spindle and bearings; the term is ...

3. Derailleur - Wikipedia

   en.wikipedia.org/wiki/Derailleur

   This avoids any clamp size issues, but requires either a frame with the appropriate braze-on, or an adapter clamp that simulates a braze-on derailleur tab. These have become common on newer road bikes, as carbon frames no longer have a round seat tube. They are rarely seen on mountain bikes.

4. Shaft-driven bicycle - Wikipedia

   en.wikipedia.org/wiki/Shaft-driven_bicycle

   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 ...

5. Motorized bicycle - Wikipedia

   en.wikipedia.org/wiki/Motorized_bicycle

   Motorized bicycle. A motorized bicycle is a bicycle with an attached motor or engine and transmission used either to power the vehicle unassisted, or to assist with pedalling. Since it sometimes retains both pedals and a discrete connected drive for rider-powered propulsion, the motorized bicycle is in technical terms a true bicycle, albeit a ...

6. Sprocket - Wikipedia

   en.wikipedia.org/wiki/Sprocket

   In the case of bicycle chains, it is possible to modify the overall gear ratio of the chain drive by varying the diameter (and therefore, the tooth count) of the sprockets on each side of the chain. This is the basis of derailleur gears. A multi-speed bicycle, by providing two or three different-sized driving sprockets and up to 12 (as of 2018 ...

7. Swagman - Wikipedia

   en.wikipedia.org/wiki/Swagman

   A swagman (also called a swaggie, sundowner or tussocker) was a transient labourer who traveled by foot from farm to farm carrying his belongings in a swag. The term originated in Australia in the 19th century and was later used in New Zealand. Swagmen were particularly common in Australia during times of economic uncertainty, such as the 1890s ...

8. Fixed-gear bicycle - Wikipedia

   en.wikipedia.org/wiki/Fixed-gear_bicycle

   A derailed chain can cause a variety of undesirable consequences, such as a locked rear wheel or, worst of all, destruction of the frame if the chain becomes caught around the pedal spindle and pulls the rear triangle forwards. On a fixed-gear bicycle without hand brakes, even a relatively benign derailment means a total loss of braking ability.

9. Bicycle frame - Wikipedia

   en.wikipedia.org/wiki/Bicycle_frame

   The 'diamond' frame's central, horizontal top bar forces the rider to swing a leg over the bicycle's seat. A Triumph step-through, ladies', or open frame Dursley Pedersen bicycle circa 1910 A penny-farthing photographed in the Škoda Auto Museum in the Czech Republic A Brompton folding bicycle Bicycle in Victorian Plymouth, England, with a predecessor of the Starley diamond-frame A cantilever ...