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  2. Inner tube - Wikipedia

    en.wikipedia.org/wiki/Inner_tube

    Two bicycle inner tubes: A larger mountain bike inner tube and a slimmer race bike tube. An inner tube is an inflatable torus that forms the interior of some pneumatic tires. [1] The tube is inflated through a valve stem and fits inside the tire casing. The inflated inner tube provides structural support and suspension, while the outer tire ...

  3. Presta valve - Wikipedia

    en.wikipedia.org/wiki/Presta_valve

    The external threads at the tip of both "threaded" and "unthreaded" Presta valves are 5V2 (#12-24TPI), which measures out to 5.2×1.058 mm, [8] the same thread size as the tip of a Dunlop valve. The external threads on the main body of "threaded" Presta valves are 6V1, which measures 6×0.80 mm. [ 8 ]

  4. Bicycle tire - Wikipedia

    en.wikipedia.org/wiki/Bicycle_tire

    New Mail Ladies Safety bicycle, circa 1891, with solid rubber tires A tubed, clincher tire showing the inner tube protruding between the tire and the rim Tubular tire rolled from rim to show glue between them Clincher cross section schematic with 1: rim, 2: rim strip, 3: rim braking surface, 4: bead core, 5: inner tube, 6: casing, 7: tread

  5. List of bicycle parts - Wikipedia

    en.wikipedia.org/wiki/List_of_bicycle_parts

    1) attachment point on frame, fork, or dropout for fenders, racks, etc. 2) a hole through which a spoke nipple passes through the rim so it may attach to a spoke Electronic Gear-Shifting System : not simply a type of shifter or a type of derailleur, a complete system with switches instead of levers, wires instead of Bowden cables, and motor ...

  6. Tubular tyre - Wikipedia

    en.wikipedia.org/wiki/Tubular_tyre

    The inner tube is covered with white talc powder to prevent it from sticking to itself. Tubular tire rolled from rim to show glue between them A tubular tyre , referred to as a tub in Britain, [ 1 ] a sew-up in the US, a single in Australia [ citation needed ] , or just a tubular is a bicycle tyre that is stitched closed around the inner tube ...

  7. Tubeless tire - Wikipedia

    en.wikipedia.org/wiki/Tubeless_tire

    Tubeless tire technology does away with the need for an inner tube thereby increasing safety. [1] [4] [citation needed] In a tubeless tire, the tire and the rim of the wheel form an airtight seal, with the valve being directly mounted on the rim. If a tubeless tire gets a small puncture, air escapes only through the hole, leading to a gentle ...

  8. Piping and plumbing fitting - Wikipedia

    en.wikipedia.org/wiki/Piping_and_plumbing_fitting

    A reducer reduces the pipe size from a larger to a smaller bore (inner diameter). Alternatively, reducer may refer to any fitting which causes a change in pipe diameter. [15] This change may be intended to meet hydraulic flow requirements of the system or adapt to existing piping of a different size. The reduction length is usually equal to the ...

  9. Headset (bicycle part) - Wikipedia

    en.wikipedia.org/wiki/Headset_(bicycle_part)

    Traditional bicycle head tubes and headsets are sized for a 25.4 mm (1 in) diameter steerer tube (also known as the fork column). Many frame and fork manufacturers are now building their parts around a steerer tube with a diameter of 28.6 mm (1 + 1 ⁄ 8 in). The larger diameter of the head tube and headset gives added stiffness to the steering ...

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