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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. Uniform Tire Quality Grading - Wikipedia

   en.wikipedia.org/wiki/Uniform_Tire_Quality_Grading

   UTQG ratings on sidewall of Toyo Tires Proxes R39 tire UTQG ratings (top) and tire code (bottom) on sidewall of Continental ContiProContact tire. Uniform Tire Quality Grading, commonly abbreviated as UTQG, is a set of standards for passenger car tires that measures a tire's treadwear, temperature resistance and traction.

4. Federal Bridge Gross Weight Formula - Wikipedia

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

   The State truck size and weight regulations apply to the Federal Aid System routes that do not have Federal limits. The weight and size of CMVs are restricted for practical and safety reasons. CMVs are restricted by gross weight (total weight of vehicle and cargo), and by axle weight (i.e., the weight carried by each tire).

5. Firestone and Ford tire controversy - Wikipedia

   en.wikipedia.org/wiki/Firestone_and_Ford_tire...

   On August 21, 2000, Ford halted production at three truck assembly plants so that 70,000 tires could be diverted towards the recall effort. P235/75R15 tires became scarce and Ford authorized dealers to install replacement tires from companies other than Firestone. Both Ford and Firestone looked for replacement tires internationally.

6. Tire uniformity - Wikipedia

   en.wikipedia.org/wiki/Tire_uniformity

   Tire uniformity refers to the dynamic mechanical properties of pneumatic tires as strictly defined by a set of measurement standards and test conditions accepted by global tire and car makers. These standards include the parameters of radial force variation , lateral force variation , conicity, ply steer, radial run-out , lateral run-out , and ...

7. Truck classification - Wikipedia

   en.wikipedia.org/wiki/Truck_classification

   The Class 8 truck gross vehicle weight rating (GVWR) is a vehicle with a GVWR exceeding 33,000 lb (14,969 kg). [ 2 ] [ 28 ] These include tractor trailer tractors, single-unit dump trucks of a GVWR over 33,000 lb, as well as non-commercial chassis fire trucks; such trucks typically have 3 or more axles. [ 29 ]