2439;39; Dually Wheels Black 24 Inch Rims and Tires ULTRA type 24
16 Inch Alcoa Dually Wheels - A wheel is usually a circular component that is supposed to rotate on an axle bearing. The wheel is one of the primary pieces of the wheel and axle which is regarded as the six simple machines. Wheels, in partnership with axles, allow heavy objects being moved easily facilitating movement or transportation while supporting a load, or performing labor in machines. Wheels are also raised for other purposes, like a ship's wheel, wheel, potter's wheel and flywheel.Common examples are normally found in transport applications. A wheel greatly reduces friction by facilitating motion by rolling together currency axles. In order that wheels to rotate, an instant should apply to the wheel about its axis, either as a result of gravity or by the effective use of another external force or torque.The English word wheel arises from the Old English word hweol, hweogol, from Proto-Germanic *hwehwlan, *hwegwlan, from Proto-Indo-European *kwekwlo-, a protracted form of the root *kwel- "to revolve, navigate around ".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, called "tournettes" or "slow wheels", were known in the Middle East via the 5th millennium BCE (one of the primary examples was discovered at Tepe Pardis, Iran, and dated to 5200–4700 BCE). These people were created from stone or clay and secured to the ground using a peg while in the center, but required effort to turn. True (freely-spinning) potter's wheels were apparently used in Mesopotamia by 3500 BCE and perhaps as soon as 4000 BCE, and then the oldest surviving example, which was used in Ur (modern day Iraq), dates to approximately 3100 BCE.The very first proof wheeled vehicles appears while in the last half of the 4th millennium BCE, near-simultaneously in Mesopotamia (Sumerian civilization), the Northern Caucasus (Maykop culture) and Central Europe (Cucuteni-Trypillian culture), and so the question which culture originally invented the wheeled vehicle remains to be unsolved.The initial well-dated depiction of any wheeled vehicle (here a wagon — four wheels, two axles) is in the Bronocice pot, a c. 3500 – 3350 BCE clay pot excavated in any 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 now dated in 2σ-limits to 3340–3030 BCE, the axle to 3360–3045 BCE.2 kinds of early Neolithic European wheel and axle are known; a circumalpine style of wagon construction (the wheel and axle rotate together, such as Ljubljana Marshes Wheel), and of this Baden culture in Hungary (axle would not rotate). They both of them are dated to c. 3200–3000 BCE.In China, the wheel was certainly present with all the adoption from the chariot in c. 1200 BCE,although Barbieri-Low[9] argues for earlier Chinese wheeled vehicles, c. 2000 BC.
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| TITLE: | 2439;39; Dually Wheels Black 24 Inch Rims and Tires ULTRA type 24 |
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| IMAGE WIDTH: | 500 |
| IMAGE HEIGHT: | 468 |
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| THUMBNAIL WIDTH: | 192 |
| THUMBNAIL HEIGHT: | 181 |
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