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Power transmission. Bicycle drivetrain systems have been developed to transmit power from riders to drive wheels by a variety of methods. Most bicycle drivetrain systems incorporate a freewheel to allow coasting, but direct-drive and fixed-gear systems do not. The latter are sometimes also described as bicycle brake systems. A belt-drive crankset.
From a mechanical viewpoint, up to 99% of the mechanical energy delivered by the rider into the pedals is transmitted to the wheels (clean, lubricated new chain at 400 W), although the use of gearing mechanisms reduces this by 1–7% (clean, well-lubricated derailleurs and a straight chainline), 4–12% (chain with 3-speed hubs), or 10–20% (shaft drive with 3-speed hubs).
MK1 1970-1972 available as a single speed coaster (SC), 3 speed (AW - three speed and TCW/S3C - three speed coasters) 5 speed (S5 - 3+2) 5 speed and 10 speed (derallieur). The single and three speed models were also available as a Girl’s model without crossbar. MK2 available as a 3 speed (AW) and 5 speed (S5 - 3+2). 1973 -1984; MK3 3 speed ...
Three-speed bicycle. The three-speed bicycle is a bicycle that uses internal hub gears at the rear wheel hub to provide three gear ratios. Three-speed hubs have been in use since the early 1900s. Though they are heavier than comparable derailleur systems, internal-gear hub systems generally last longer and require less maintenance.
They were originally built as 2-6-6-2s but were refitted with a four-wheel leading truck to increase stability at speed. Southern Pacific AM-2s were built from July to August 1911 by Baldwin Locomotive Works as Cab Forwards. These 4-6-6-2s began retirement in the mid- to late-1930s, although a few remained in operation until the end of World ...
The Suzuki GT750 is a water-cooled three-cylinder two-stroke motorcycle made by Suzuki from 1971 to 1977. It is the first Japanese motorcycle with a liquid-cooled engine. [3] The Society of Automotive Engineers of Japan (in Japanese) includes the 1971 Suzuki GT750 as one of their 240 Landmarks of Japanese Automotive Technology. [4]
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