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2. Dunlop valve - Wikipedia

   en.wikipedia.org/wiki/Dunlop_valve

   The Dunlop valve, (also called a Woods valve, an English valve or a Blitz valve [1]) is a type of pneumatic valve stem in use—mostly on inner tubes of bicycles—in many countries, including Japan, [2] Korea, India, Pakistan, Sri Lanka, most European countries, and a number of developing countries.

3. Columbus (company) - Wikipedia

   en.wikipedia.org/wiki/Columbus_(company)

   Columbus tubing was the main competitor to TI Reynolds 531 in the bicycle tube set market with many of the big name Italian manufacturers of bicycles and framesets utilising their products. [3] Famous name builders such as Bianchi , [ 4 ] Centurion Bicycles (after 1981), De Rosa , Ciocc , [ 5 ] Pinarello , and Colnago all specified the Columbus ...

4. Reynolds 531 - Wikipedia

   en.wikipedia.org/wiki/Reynolds_531

   Reynolds 531 "was the standard of excellence for many decades" among bicycle frame-building materials. [1] And because of the availability of a wide range of butting, diameters and thicknesses of tubes, along with different stays and fork blades, it became the tubing of choice for most frame builders.

5. Stem (bicycle part) - Wikipedia

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

   Thus a quill stem made to fit a 28.6 mm (1 + 1 ⁄ 8 in) steerer tube has an outer diameter of 25.4 mm (1 in). For 25.4 mm (1 in) steerer tubes the quill diameter is most often 22.2 mm (7 ⁄ 8 in) but some older American bicycles used 21.15 mm. Some older French bicycles used 25 mm steerer tubes with 22 mm diameter quill stems. [6]

6. 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 ...

7. Headset (bicycle part) - Wikipedia

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

   The headset is the set of components on a bicycle that provides a rotatable interface between the bicycle fork and the head tube of a bicycle frame. The tube through which the steerer of the fork passes is called the head tube. A typical headset consists of two cups that are pressed into the top and bottom of the headtube.