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  2. Bicycle pump - Wikipedia

    en.wikipedia.org/wiki/Bicycle_pump

    Bicycle floor pump Foot-operated bike pump Frame-mounted bike pump Outdoor public air compressor for bicycles. A bicycle pump is a type of positive-displacement air pump specifically designed for inflating bicycle tires. It has a connection or adapter for use with one or both of the two most common types of valves used on bicycles, Schrader or ...

  3. Contact patch - Wikipedia

    en.wikipedia.org/wiki/Contact_patch

    These two properties are not linearly proportional to the area of the contact. For example, a 10% change in load or inflation pressure usually does not result in a 10% change in the contact patch area [ 3 ] because the load or pressure on a tire can be altered freely, and the contact patch area is affected by the tire geometry and stiffness.

  4. Presta valve - Wikipedia

    en.wikipedia.org/wiki/Presta_valve

    Further, at least some motor-paced speed record bicycles have used Schrader valves. (The actual speed of Schrader opening depends on many factors; 150 kph is only a very rough guide. The important observation is a Presta valve's nut is not an advantage in actual use, because ordinary bicycles do not go fast enough for it to matter.)

  5. Schrader valve - Wikipedia

    en.wikipedia.org/wiki/Schrader_valve

    Inflating a bicycle tire equipped with a Presta or Dunlop valve at an automobile filling station requires an adaptor, while a Schrader-valved tube does not. Inflating at home or on the road requires either 6mm air chuck for Presta and Dunlop valves, or an 8mm chuck for Schrader valves. An important advantage of Schrader valves relative to ...

  6. Rolling resistance - Wikipedia

    en.wikipedia.org/wiki/Rolling_resistance

    Sidewall deflection is not a direct measurement of rolling friction. A high quality tire with a high quality (and supple) casing will allow for more flex per energy loss than a cheap tire with a stiff sidewall. [citation needed] Again, on a bicycle, a quality tire with a supple casing will still roll easier than a cheap tire with a stiff casing ...

  7. 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.

  8. Nissan warns owners of older vehicles not to drive them due ...

    www.aol.com/news/nissan-warns-owners-older...

    Nissan is urging the owners of about 84,000 older vehicles to stop driving them because their Takata air bag inflators have an increased risk of exploding in a crash and hurling dangerous metal ...

  9. Valve stem - Wikipedia

    en.wikipedia.org/wiki/Valve_stem

    An inflator stem is not used; instead, a removable cap on a valve stem embedded in the tire rim is fitted, with only the cap visible. When inflating the tire, the cap is first removed, typically with a coin, and then a "portable" dedicated inflator stem is screwed onto the valve stem. Through the inflator, the tire is inflated as usual.

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