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2. Wheel sizing - Wikipedia

   en.wikipedia.org/wiki/Wheel_sizing

   Example of tire sizing on an all-terrain vehicle. 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 ...

3. Tire code - Wikipedia

   en.wikipedia.org/wiki/Tire_code

   Prior to 1964, tires were all made to a 90% aspect ratio. Tire size was specified as the tire width in inches and the diameter in inches – for example, 6.50-15. [29] From 1965 to the early 1970s, tires were made to an 80% aspect ratio. Tire size was again specified by width in inches and diameter in inches.

4. Vehicle size class - Wikipedia

   en.wikipedia.org/wiki/Vehicle_size_class

   SUV (includes crossover SUVs) size, exterior vehicle length (excluding rear mounted spare wheel/tyre) multiplied by exterior vehicle width (excluding mirrors), both in millimetres. Small/Light SUV: less than 8.1 m 2 (87 sq ft) Medium SUV: 8.1 to 8.8 m 2 (87 to 95 sq ft) Large SUV: 8.8 to 9.8 m 2 (95 to 105 sq ft)

5. European Tyre and Rim Technical Organisation - Wikipedia

   en.wikipedia.org/wiki/European_Tyre_and_Rim...

   ETRTO sizes apply to rims and tyres for vehicles of all types, including bicycles. The great advantage of ETRTO sizing is that it is unambiguous; previously, nominal dimensions were used which were interpreted in different ways by different countries and manufacturers - a problem for the end user.

6. Contact patch - Wikipedia

   en.wikipedia.org/wiki/Contact_patch

   Colorized tire footprint pressure distribution. The contact patch is the portion of a vehicle's tire that is in actual contact with the road surface.It is commonly used in the discussion of pneumatic (i.e. pressurized) tires, where the term is used strictly to describe the portion of the tire's tread that touches the road surface.

7. Oshkosh P-19R Aircraft Rescue and Fire Fighting vehicle

   en.wikipedia.org/wiki/Oshkosh_P-19R_Aircraft...

   The P-19R is fitted with Michelin XZL 16.00 R 20 tires. A Dana central tire inflation system (CTIS) is fitted, this allowing the driver to adjust tire pressures to suit the terrain being crossed. A spare wheel/tire is carried at the rear of the vehicle. [10] The cab seats four, a driver and three crew. The driver sits centrally. [10]