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  2. List of bicycle parts - Wikipedia

    en.wikipedia.org/wiki/List_of_bicycle_parts

    Cartridge bearing: a type of bearing that is not user-serviceable, but must be replaced as a unit; Cassette: a group of stacked sprockets on the rear wheel of a bicycle with a rear derailleur; Coaster brake or backpedal brake; Chain: a system of interlinking pins, plates and rollers that transmits power from the front sprocket(s) to the rear ...

  3. Park Tool - Wikipedia

    en.wikipedia.org/wiki/Park_Tool

    A Park Tool bicycle work stand. The founders of Park Tool along with James E. Johnson developed a clamping device on their original bike repair stand, for which they received a United States Patent in 1976. [3] The company has applied for and has been granted many patents since then, including a pizza cutter shaped like a penny-farthing.

  4. Bottom bracket - Wikipedia

    en.wikipedia.org/wiki/Bottom_bracket

    The design resembles the external bottom bracket designs marketed by FSA, RaceFace and Shimano. The modern versions used the same sealed bearing size (6805-RS, 25 mm inner diameter, 37 mm outer diameter) and the original mounting tool fits. The crank had intricately CNC machined wide hollow crank arms made of two halves glued together.

  5. Bearing surface - Wikipedia

    en.wikipedia.org/wiki/Bearing_surface

    The bearing surface describes the contact area between two objects used as datum. It is often the underside of a screw head (male seat, marked A) or a flat at the end of the screw thread (female seat, marked B). A bearing surface in mechanical engineering is the area of contact between two objects.

  6. Boss (engineering) - Wikipedia

    en.wikipedia.org/wiki/Boss_(engineering)

    Like a process on a bone, bosses on castings can provide attachment points or bearing surfaces. [ 2 ] The term 'boss' when used in engineering can also relate to a finishing edge around (usually) a circular opening that allows the opening to locate onto, or within another opening thus locating or joining two items together with a view to the ...

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  8. Color wheel - Wikipedia

    en.wikipedia.org/wiki/Color_wheel

    A color wheel or color circle [1] is an abstract illustrative organization of color hues around a circle, which shows the relationships between primary colors, secondary colors, tertiary colors etc. Some sources use the terms color wheel and color circle interchangeably; [ 2 ] [ 3 ] however, one term or the other may be more prevalent in ...

  9. Sundial - Wikipedia

    en.wikipedia.org/wiki/Sundial

    A combined analemmatic-equatorial sundial in Ann Morrison Park in Boise, Idaho, 43°36'45.5"N 116°13'27.6"W A sundial is a horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the apparent position of the Sun in the sky .