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A Suntour Sprint rear derailleur A front derailleur manufactured by Suntour a pair of Suntour road brakes. In 1964, Suntour invented the slant-parallelogram rear derailleur. The parallelogram rear derailleur had gained prominence after Campagnolo's introduction of the "Gran Sport" in 1949, [7] [8] and the slant-parallelogram was an improvement of it that allowed the derailleur to maintain a ...
Extension tubes are sometimes confused with teleconverters, an optical component (i.e., containing lenses) designed to increase effective focal length. A close-up lens also enables focusing closer for macro photography but, unlike an extension tube, a close-up lens actually is an optical element.
1968 BMW R60US with conventional telescopic fork Telescopic fork in upside down design, with stanchions at the bottom.. Conventional telescopic forks invariably have a pair of fork tubes, or "stanchions", at the top, clamped to a triple tree (also called a triple clamp or a yoke), and the sliders are at the bottom, attached to the front wheel spindle.
youtube-dl is a free and open source software tool for downloading video and audio from YouTube [3] and over 1,000 other video hosting websites. [4] It is released under the Unlicense software license. [5] As of September 2021, youtube-dl is one of the most starred projects on GitHub, with over 100,000 stars. [6]
Petit Tube is a French website that searches through an algorithm for obscure YouTube videos and displays them on the website, cycling through content to display and allowing people to view videos that would have otherwise been seen by few people. [1] [2] The website was launched in 2011. Its founder is Yann van der Cruyssen, a French digital ...
Forks have been made from steel, aluminum, carbon fiber, titanium, magnesium, and various combinations. For example, a fork may have carbon fiber blades with an aluminum crown, steerer tube, or fork ends. In rigid forks the material, shape, weight, and design of the forks can noticeably affect the feel and handling of the bicycle.
Zeron 100 Super Duplex was born from a research project undertaken by Dr Cecil Roscoe at the University of Manchester, England. Tasked by his then employer – Mather+Platt – with studying the effect of various alloying additions on the mechanical properties and corrosion resistance of Zeron 25, he concluded that an optimum corrosion performance could be obtained from a duplex stainless ...
A stem must be compatible with the dimensions of the fork steerer tube. Steerer tubes come mainly in two common nominal sizes: 25.4 and 28.6 mm (1 and 1 + 1 ⁄ 8 in). Less commonly 31.8 mm ( 1 + 1 ⁄ 4 in) was used on some mountain bikes and tandems and has now returned on some carbon fiber forks, and 38.1 mm ( 1 + 1 ⁄ 2 in) is found on ...