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This is a typical 18 wheeler. It is what you see most often on US highways and is used for interstate transport:

A wheel is usually a reference to a rim and tire combination.Hot Rolled Galvanized Steel Channel- 18 rim/tire combinations.

It has one wheel and tire on each front position. Each of the other positions typically have two rims and tires for a total of 8 on the rear of the tractor and 8 more on the rear of the trailer.S. S Galvanized PVC Razor Barbed Wire Mesh Fencing Wire Cbt-60. These are two separate rims and tires for each position.Profession Supply Monochrome Segment Clock LCD Display(four tire/rim combinations) visible in this picture:

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A truck with double trailers has lots of rims/tires, but might still be referred to as an 18 wheeler by the public:

Same with triples:

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This is the wheel arrangement on an 18 wheeler:

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If the tractor and trailer were equipped with SS’s, it would be a ten wheeler,Yh Dwj Water Jet Abrasive Cutting Head for Waterjet Cutting Machine.

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So,DC Brushless 133 mm Plastic Centrifugal Dust Extraction Fan? Because it has become a generic term, everyone understands what it means,Customized Business Manager Presentation Document File Folder. It’s much like steamrollers.They haven’t been driven by steam for almost a century,Auto Interior Bracket Checking Fixture.

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The trailers then typically have 2 axles with 2 tyres each per side.China Price Best Spc Vinyl Flooring. Giving 8 tyres/Customized Design Steel Structure Prefabricated House for Workshop/Workshop/Hangar/Garage.

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To save drag and fuel when empty one of each dual axle on the tractor and trailer can be lifted up. In this case, you’d end up with a 10 wheeler on the ground.

Let me straighten this out.

There has been constant, long-standing confusion between the distinct meanings of “wheel”.

Wheel can refer to “wheel rim”. It is the cylindrical structure to which a pneumatic tire is attached. There must be one tire on each wheel rim and I am not aware of any exception.

Wheel can also refer to “wheel hub”. It is the structure to which wheel rim or wheel rims are attached with studs.RJ45 Network connector. If the hub is on a driving axle,4G Lte Wireless SIM Card CPE with VPN, Ipsec Apn, Pptp, Gre. On a steering axle, it is the hub that steers which in turn steers the wheel rim. There must be a pair of wheel hubs on one axle, but there can be one or two wheel rims on a wheel hub. Some agricultural tractors even have more than two wheel rims on one hub.

The word “wheel” sometimes refers to wheel rims, as in “18-wheeler”.

A tractor semi-trailer combination is a ubiquitous type of highway freight transportation vehicle all over the world. A tractor which has a “fifth wheel” pulls a semi-trailer,Custom Logo Printing Flip Cover Magnet Gift Packaging Box“fifth wheel” on the tractor is regarded as an articulation joint.

A typical North American combination consists of a tractor with three axles (one front axle and a set of driving tandem axle), and a semi-trailer with two axles. Before super-High Quality Quick Deliver Date Black Color PVC Coated Stainless Steel Strip Banding for Multipurpose 3/4, all axles, except the front steering axle, are fitted with dual-tireson each side. That means two wheel rims, and hence two tires, on each wheel hub. Since one axle has two hubs, an axle with dual-tires counts a total of four tires.

So in the colloquial term “18-wheeler”, the word “wheel” here means “wheel rim”. An 18-wheeler has a total of (2+4+4)+(4+4)=18 wheel rims, and hence 18 tires.

However, an 18-wheeler has only 10 wheel hubs.

When does “wheel” refer to “wheel hub”?

When we refer to driving configurations, as in RWD, FWD, 4x4, etc.

If you ask any truck driver what his/her truck’s driving configuration is, he/Wholesale China Selling Window Cleaner Household Smart Automatic Glass Cleaner

“It’s a 6x4” or “4x2” or “8x6”, etc.

A 6x4 means the truck has three axles, and two of them drive. Because, again, there are two wheel hubs on each axle, you times the axle number by 2 to get the wheel hub number.

But from 6x4, you will not know exactly how many wheel rims or tires the truck has. Most possibly, it has (2+4+4=) 10, but it could also be six (Carbon Steel Pipe Fitting Concentric Reducers Used for Pipe Diameter Changes), or other much less possible layout.

So back to your question. Your statement is not wrong. It depends on how you interpret the word “wheel”.

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• Here, “wheel” means “wheel rims” and therefore “tires”, and
• Typically they have 18 wheel rims and therefore 18 tires.

Hope this clarifies things a little bit.