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Wheel sizing
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==Units== The millimetre is most commonly used to specify dimensions in modern production,{{citation needed|date=September 2020}} but marketing of wheel sizes towards customers is still sometimes done with traditional systems. For example, wheels for [[road bicycle]]s are often referred to as 700C, when they actually measure 622 mm.<ref>{{Cite web|url=https://www.sheldonbrown.com/harris/rims/622.html|title=622 mm - 700c - 29 inch Bicycle Rims from Harris Cyclery|website=www.sheldonbrown.com}}</ref> Wheel diameters and widths for cars are stated in [[inch]]es, while car tire bead diameters are stated in inches and widths are in millimetres.
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