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2. ISO 5775 - Wikipedia

   en.wikipedia.org/wiki/ISO_5775

   The rim type codes SS or HB precede the rim designation, whereas code C is appended to the nominal width. Examples: SS 400×20, HB 422×25, 620×13C. The nominal width of a rim is the inner width between the straight sides or beads as one can easily measure it with a caliper (see the standard for drawings and exact measurement procedures).

3. Bicycle wheel - Wikipedia

   en.wikipedia.org/wiki/Bicycle_wheel

   This tradition was started initially because the early mountain bike pioneers procured the wheels for their early bikes from American-made bicycles rather than the larger European standards in use. The typical 26-inch rim has a diameter of 559 millimetres (22.0 in) and an outside tire diameter of about 26.2 inches (670 mm).

4. Presta valve - Wikipedia

   en.wikipedia.org/wiki/Presta_valve

   The Presta valve (also French valve (FV) or Sclaverand valve) is a type of tire valve commonly found on high pressure bicycle inner tubes and is commonly used on tubeless setups. It consists of an outer valve stem and an inner valve body. A lock nut to secure the stem at the wheel rim and a valve cap may also be present.

5. 29er (bicycle) - Wikipedia

   en.wikipedia.org/wiki/29er_(bicycle)

   29″ and 26″ mountain bike wheels. 29er rims have an interior diameter of 622 millimetres (24.5 in) [1] and the average 29″ mountain bike tire is (in ISO notation) 59-622 – corresponding to an outside diameter of about 29.15 inches (740 mm). The typical 26″ MTB tire has a rim diameter of 559 millimetres (22.0 in) and an outside tire ...

6. Tire bead - Wikipedia

   en.wikipedia.org/wiki/Tire_bead

   Tire bead is the term for the edge of a tire that sits on the rim. Wheels for automobiles, bicycles, etc. are made with a small slot or groove into which the tire bead sits. When the tire is properly inflated, the air pressure within the tire keeps the bead in this groove. Reducing tire air pressure is a frequent practice among off-road vehicle ...

7. Roadster (bicycle) - Wikipedia

   en.wikipedia.org/wiki/Roadster_(bicycle)

   A club bicycle would typically have Reynolds 531 frame tubing, a narrow, unsprung leather saddle, inverted North Road handlebars (or drop bars), steel "rat trap" pedals with toe clips, 5-15 speed derailleur gearing, alloy rims and light high-pressure 660 mm × 32 mm (26 in × 1 + 1 ⁄ 4 in) (ISO 597) or 686 mm × 32 mm (27 in × 1 + 1 ⁄ 4 in ...