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  2. RattleCAD - Wikipedia

    en.wikipedia.org/wiki/RattleCAD

    rattleCAD — is a parametric 2D CAD software specific for bicycle design, [1] [2] in particular for design bicycle frame, [3] [4] developed by the Austrian cyclist and programmer Manfred Rosenberger since 2008. [5]

  3. Gear inches - Wikipedia

    en.wikipedia.org/wiki/Gear_inches

    Simplified diagram of gear inches: As the rear sprocket is halfed in size, the distance traveled by the rear wheel doubles, at half the torque. Gear inches is an imperial measure corresponding to the diameter in inches of the drive wheel of a penny-farthing bicycle with equivalent ( direct-drive ) gearing.

  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. Bicycle gearing - Wikipedia

    en.wikipedia.org/wiki/Bicycle_gearing

    A Rohloff Speedhub hub gear A Shimano XT rear derailleur on a mountain bike A bicycle gearbox with chain tensioner. Bicycle gearing is the aspect of a bicycle drivetrain that determines the relation between the cadence, the rate at which the rider pedals, and the rate at which the drive wheel turns.

  6. Electronic gear-shifting system - Wikipedia

    en.wikipedia.org/wiki/Electronic_gear-shifting...

    [10] [11] A wireless system that can be retrofitted onto any bicycle was announced in 2016. [12] The front and rear derailleurs remain in place, while a wireless gear-change controller is added to the handlebar, with configuration of the system via an iOS/Android app, and customization can be added to the button controllers via the Bluetooth ...

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  9. Derailleur - Wikipedia

    en.wikipedia.org/wiki/Derailleur

    In road racing, the swiftest gear changes are required on the sprints to the finish line. Therefore high-normal types, which allow a quick change to a higher gear, remain the preference. [citation needed] Low normal or rapid rise rear derailleurs return the chain to the largest sprocket on the cassette when no cable tension is applied.