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2. Three-speed bicycle - Wikipedia

   en.wikipedia.org/wiki/Three-speed_bicycle

   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.

3. Sturmey-Archer - Wikipedia

   en.wikipedia.org/wiki/Sturmey-Archer

   A Sturmey-Archer three speed hub, the most common kind of Sturmey-Archer gear. Sturmey-Archer was a manufacturing company originally from Nottingham, England.It primarily produced bicycle hub gears, brakes and a great many other sundry bicycle components, most prominently during its heyday as a subsidiary of the Raleigh Bicycle Company.

4. Bicycle performance - Wikipedia

   en.wikipedia.org/wiki/Bicycle_performance

   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).

5. Hub gear - Wikipedia

   en.wikipedia.org/wiki/Hub_gear

   v. t. e. Sturmey-Archer S3X. A hub gear, [ 1] internal-gear hub, [ 2] internally geared hub[ 3] or just gear hub[ 4] is a gear ratio changing system commonly used on bicycles that is implemented with planetary or epicyclic gears. The gears and lubricants are sealed within the shell of the hub gear, in contrast with derailleur gears where the ...

6. Raleigh Chopper - Wikipedia

   en.wikipedia.org/wiki/Raleigh_Chopper

   The bike featured a choice of a single-speed coaster hub, a 3-speed coaster, a standard non-coaster 3 speed or 5-speed (3+2) Sturmey Archer gear hub, selected using a frame-mounted console gear lever.

7. Murray (bicycle company) - Wikipedia

   en.wikipedia.org/wiki/Murray_(bicycle_company)

   Murray 3-speed bicycle In June 1988, the Murray Ohio Manufacturing Company was acquired by the British investment group Tomkins plc . In 1996, Murray Inc., one of the last major U.S. bicycle producers along with Huffy Bicycle and Roadmaster (formerly AMF), received a major blow when U.S. courts ruled that imports from China were not a "material ...