Editing Tire (section)

== On the wheel ==
{{Main|Wheel|Bicycle wheel|Motorcycle wheel}}
[[File:Fietband lek zoeken.jpg|thumb|A [[Bicycle tire#Tubed|bicycle inner tube]] with [[valve stem]]]]
Associated components of tires include the wheel on which it is mounted, the valve stem through which air is introduced, and, for some tires, an inner tube that provides the airtight means for maintaining tire pressure.

* ''Wheel'': Pneumatic tires are mounted onto [[wheel]]s that most often have integral rims on their outer edges to hold the tire. Automotive wheels are typically made from pressed and welded steel, or a composite of lightweight metal [[alloy]]s, such as aluminum or magnesium. There are two aspects to how pneumatic tires support the rim of the wheel on which they are mounted.<ref name="Clark1">{{cite book|title=Mechanics of Pneumatic Tires |first1=Samuel K. |last1=Clark |first2=V.E. |last2=Gough |date=1981 |publisher=U.S. Department of Transportation |page=245 |quote=Consider two mechanisms of force transmission acting in parallel.}}</ref> First, the tension in the [[#Ply|cords]] pull on the [[#Bead|bead]] uniformly around the wheel, except where it is reduced above the contact patch.<ref name="Clark2">{{cite book|title=Mechanics of Pneumatic Tires |first1=Samuel K. |last1=Clark |first2=V.E. |last2=Gough |date=1981 |publisher=U.S. Department of Transportation |page=246 |quote=The only possible way in which the reaction can develop at the rim is by the changes in magnitude and direction of the membrane stresses at their points of attachment to the rim, in the region of the membrane near the point where the plate is pressed against it.}}</ref> Second, the bead transfers that net force to the rim.<ref name="Clark3">{{cite book|title=Mechanics of Pneumatic Tires |first1=Samuel K. |last1=Clark |first2=V.E. |last2=Gough |date=1981 |publisher=U.S. Department of Transportation |page=246 |quote=This force pulls the bead coil against the base of the wheel rim above the contact area, thus transmitting the upward force to the wheel.}}</ref><ref name="Clark2" /> Tires are mounted on the wheel by forcing its beads into the channel formed by the wheel's inner and outer rims.<ref>{{cite book|url= https://books.google.com/books?id=_LZMAQAAIAAJ&q=define:+wheel+rim&pg=PA579|title=American Machinist, Volume 40|date=1914-04-02|pages=597–598|access-date=2012-03-14}}</ref><ref>{{cite web|url= http://www.osha.gov/Publications/wheel/wheel-chart-booklet.pdf|title=Demounting and Mounting Procedures|year=2011|publisher=Occupational Safety and Health Administration|access-date=2012-03-14|archive-date=27 February 2012|archive-url= https://web.archive.org/web/20120227123006/http://www.osha.gov/Publications/wheel/wheel-chart-booklet.pdf|url-status=dead}}</ref>
* ''Valve stem'': Pneumatic tires receive their air through a [[valve stem]]—a tube made of metal or rubber, with a [[check valve]], typically a [[Schrader valve]] on automobiles and most bicycle tires, or a [[Presta valve]] on high-performance bicycles. They mount directly to the rim, in the case of tubeless tires, or are an integral part of the inner tube. Most modern passenger vehicles are now required to have a [[Tire-pressure monitoring system|tire pressure monitoring system]] which usually consists of a valve stem attached to an electronic module.<ref name="Erjavec-2005"/>
* ''Inner tube'': Most [[bicycle tire]]s, many [[motorcycle tire]]s, and many tires for large vehicles such as buses, heavy trucks, and tractors are designed for use with [[inner tube]]s. Inner tubes are [[torus]]-shaped balloons made from an impermeable material, such as soft, elastic synthetic rubber, to prevent air leakage. The inner tubes are inserted into the tire and inflated to retain air pressure. Large inner tubes can be reused for other purposes, such as swimming and rafting (see [[swim ring]]), [[tubing (recreation)]], [[sledding]], and [[skitching]]. Purpose-built inflatable tori are also manufactured for these uses, offering a choice of colors, fabric covering, handles, decks, and other accessories, and eliminating the protruding valve stem.