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17 Inch Steel Wheels - A wheel can be a circular ingredient that is supposed to rotate by using an axle bearing. The wheel is one of the many elements of the wheel and axle which has become the six simple machines. Wheels, along with axles, allow heavy objects to always be moved easily facilitating movement or transportation while supporting a large quanity, or performing labor in machines. Wheels may also be put to use for other purposes, such as a ship's wheel, tyre, potter's wheel and flywheel.Common examples are merely in transport applications. A wheel greatly reduces friction by facilitating motion by rolling together utilizing axles. To ensure that wheels to rotate, a second has to apply to the wheel about its axis, either because of gravity or by use of another external force or torque.The English word wheel was produced from the Old English word hweol, hweogol, from Proto-Germanic *hwehwlan, *hwegwlan, from Proto-Indo-European *kwekwlo-, a protracted form of the source *kwel- "to revolve, move about ".Cognates within Indo-European include Icelandic hjól "wheel, tyre", Greek κύκλος kúklos, and Sanskrit chakra, the latter both meaning "circle" or "wheel ".Precursors of wheels, named "tournettes" or "slow wheels", were known while in the Middle East by its 5th millennium BCE (one of the earliest examples was discovered at Tepe Pardis, Iran, and dated to 5200–4700 BCE). These people were crafted from stone or clay and secured to the ground with a peg with the center, but required effort to turn. True (freely-spinning) potter's wheels were apparently used in Mesopotamia by 3500 BCE and perhaps around 4000 BCE, additionally,the oldest surviving example, which had been located in Ur (modern day Iraq), dates to approximately 3100 BCE.
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The initial proof of wheeled vehicles appears while in the second half belonging to the 4th millennium BCE, near-simultaneously in Mesopotamia (Sumerian civilization), the Northern Caucasus (Maykop culture) and Central Europe (Cucuteni-Trypillian culture), so the question of which culture originally invented the wheeled vehicle holds unsolved.The initial well-dated depiction associated with a wheeled vehicle (here a wagon — four wheels, two axles) is around the Bronocice pot, a c. 3500 – 3350 BCE clay pot excavated from a Funnelbeaker culture settlement in southern Poland.The oldest securely dated real wheel-axle combination, that from Stare Gmajne near Ljubljana in Slovenia (Ljubljana Marshes Wooden Wheel) is right now dated in 2σ-limits to 3340–3030 BCE, the axle to 3360–3045 BCE.Two types of early Neolithic European wheel and axle are known; a circumalpine method of wagon construction (the wheel and axle rotate together, like in Ljubljana Marshes Wheel), and the on the Baden culture in Hungary (axle will never rotate). They are dated to c. 3200–3000 BCE.In China, the wheel was certainly present together with the adoption of the chariot in c. 1200 BCE,although Barbieri-Low[9] argues for earlier Chinese wheeled vehicles, c. 2000 BC.

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TITLE:	trailer wheel rim Images buy trailer wheel rim
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THUMBNAIL:	https://tse1.mm.bing.net/th?id=OIP.6s7-CFh8yd62OzwHLHKBIwEsEs&pid=Api&w=180&h=181
IMAGE SIZE:	13353 B Bs
IMAGE WIDTH:	300
IMAGE HEIGHT:	300
DOCUMENT ID:	OIP.6s7-CFh8yd62OzwHLHKBIwEsEs
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THUMBNAIL WIDTH:	180
THUMBNAIL HEIGHT:	181

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