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2. Snow chains - Wikipedia

   en.wikipedia.org/wiki/Snow_chains

   Chains are usually sold in pairs and often must be purchased to match a particular tire size (tire diameter and tread width), although some designs can be adjusted to fit various sizes of tire. Driving with chains reduces fuel efficiency , and can reduce the allowable speed of the automobile to approximately 50 km/h (30 mph), but increase ...

3. ISO 5775 - Wikipedia

   en.wikipedia.org/wiki/ISO_5775

   The section height of a tire is usually identical to its section width (for tires less than 28 mm, 2.5 mm have to be added to the width to get the height). The overall diameter of the tire is then the rim diameter plus twice the tire's section height. The ISO 5775-1 standard also defines procedures for measuring tires and for calculating from ...

4. These Expert-Recommended Tire Chains Will Keep Your Vehicle ...

   www.aol.com/7-best-tire-chains-2023-172000176.html

   Auto-Trac Light Truck/SUV Tire Traction Chain (Set of 2) Built from manganese alloy steel, these tire chains feature square crosslinks for maximum grip and durability and come in a variety of ...

5. Tire code - Wikipedia

   en.wikipedia.org/wiki/Tire_code

   To take a common example, 195/55R16 would mean that the nominal width of the tire is approximately 195 mm at the widest point, the height of the side-wall of the tire is 55% of the width (107 mm in this example) and that the tire fits 16-inch-diameter (410 mm) rims. The code gives a direct calculation of the theoretical diameter of the tire.

6. Wheel sizing - Wikipedia

   en.wikipedia.org/wiki/Wheel_sizing

   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.

7. 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.