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  2. 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.

  3. 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.

  4. NuVinci continuously variable transmission - Wikipedia

    en.wikipedia.org/wiki/NuVinci_Continuously...

    The 3.6 kg (8 lb) NuVinci rear hub. Comparatively, the newer NuVinci hubs from around 2010 [citation needed] weighs 2.4 kg (5.4 lb) The NuVinci CVT may be applicable to many different products using a mechanical power transmission. The only application currently commercialized is the internally geared bicycle hub.

  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 gears ...

  6. Rohloff Speedhub - Wikipedia

    en.wikipedia.org/wiki/Rohloff_Speedhub

    The Rohloff Speedhub is an epicyclic internal hub gear for bicycles, developed and patented by Rohloff AG. It has been manufactured and marketed by that company since 1998. [1] The Speedhub 500/14 has 14 equally spaced, sequential, non-overlapping gear ratios operated by a single twistgrip. The overall gear range is 526%, meaning the highest ...

  7. Raleigh Twenty - Wikipedia

    en.wikipedia.org/wiki/Raleigh_Twenty

    The Raleigh "Twenty" or "Shopper" was a small-wheeled bicycle made by Raleigh from 1968 until the early 1980s. It was Raleigh's answer to the Dawes Kingpin, which had been on the market since 1964. The Twenty was made in both folding and "fixed" versions. The Twenty was a companion model to the RSW 16, which had been Raleigh's competitor to the ...

  8. Bicycle gearing - Wikipedia

    en.wikipedia.org/wiki/Bicycle_gearing

    One standard option for the Brompton folding bicycle is to use a 3-speed hub gear (roughly a 30% difference between gear ratios) in combination with a 2-speed derailleur gear (roughly a 15% difference) to give 6 distinct gear ratios; this is an example of half-step gearing. Some Brompton suppliers offer a 2-speed chainring 'Mountain Drive' as ...

  9. Wheel hub motor - Wikipedia

    en.wikipedia.org/wiki/Wheel_hub_motor

    Raleigh SC30 converted to an electric bicycle with an aftermarket electric conversion hub motor kit. A wheel hub motor, hub motor, or in-wheel motor is a motor that is incorporated into the hub of the wheel. Wheel-hub motors are commonly found on electric bicycles. Electric hub motors were well-received in early electric cars, but have not been ...

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