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2. Tire code - Wikipedia

   en.wikipedia.org/wiki/Tire_code

   Starting in 1972 tires were specified by load rating, using a letter code. In practice, a higher load rating tire was also a wider tire. In this system a tire had a letter, optionally followed by "R" for radial tires, followed by the aspect ratio, a dash and the diameter – C78-15 or CR78-15 for bias and radial, respectively. Each diameter of ...

3. Federal Bridge Gross Weight Formula - Wikipedia

   en.wikipedia.org/wiki/Federal_Bridge_Gross...

   CMVs are restricted by gross weight (total weight of vehicle and cargo), and by axle weight (i.e., the weight carried by each tire). The federal weight limits for CMVs are 80,000 pounds (36,000 kg) for gross weight (unless the bridge formula dictates a lower limit), 34,000 pounds (15,000 kg) for a tandem axle, and 20,000 pounds (9,100 kg) for a ...

4. Truck classification - Wikipedia

   en.wikipedia.org/wiki/Truck_classification

   Class B permits the use of vehicles with GVWRs of not more than 3 500 kg plus a trailer with GTWR not exceeding 750 kg; or, a trailer above this limit so long as the combined gross weight of car and trailer does not exceed 3 500 kg (in some jurisdictions a higher combined weight limit of 4 250 kg is permitted after a theoretical and practical ...

5. Tire sizes and ratings: What do letters and numbers mean?

   www.aol.com/news/tire-sizes-ratings-letters...

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6. Vehicle weight - Wikipedia

   en.wikipedia.org/wiki/Vehicle_weight

   The gross trailer weight rating (GTWR) is the total mass of a road trailer that is loaded to capacity, including the weight of the trailer itself, plus fluids and cargo, that a vehicle is rated to tow by the manufacturer. In the United States and Canada, the static tongue load, the weight of the trailer as measured at the trailer coupling, is ...

7. SAE J2807 - Wikipedia

   en.wikipedia.org/wiki/SAE_J2807

   SAE J2807 is an SAE standard for determining the towing capacity of passenger cars, multipurpose passenger vehicles, and trucks. [1] It was written to allow consumers to more accurately compare vehicles from different manufacturers.