Search results
Results from the WOW.Com Content Network
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 ...
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.
Not all tires are created equal, and most of the details that make the difference are summarized on the sidewall. Here's how to read a tire. Tire sizes and ratings: What do letters and numbers mean?
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 ...
Modern road tires have several measurements associated with their size as specified by tire codes like 225/70R14. The first number in the code (e.g., "225") represents the nominal tire width in millimeters. This is followed by the aspect ratio (e.g.,"70"), which is the height of the sidewall expressed as a percentage of the nominal tire width.
Tire balance measurement is a test where the tire is automatically placed on wheel halves, rotated at a high speed and measured for imbalance. Large commercial truck/bus tires, as well as some passenger and light truck tires, are inspected by X-ray or magnetic induction based inspection machines, that can penetrate the rubber to analyze the ...
While tire lettering was previously drawn or painted onto the tires, in the late 1960s, tire manufacturers began producing white letter tires that were part of the tire. Early automobile tires were made of pure natural rubber with various chemicals mixed into the tread compounds to make them wear better [4]. The best of these was zinc oxide, a ...
The exact ratio of sidewall compliance to tread compliance is a factor in tire construction and inflation pressure. [ 3 ] Because the tire deformation tends to reach a maximum behind the center of the contact patch, by a distance known as pneumatic trail , it tends to generate a torque about a vertical axis known as self aligning torque .