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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.
[21] [22] As of 2016, snow tires were 3.6% of the US market and 35% of the Canadian market. [23] US states and Canadian provinces control the use of snow tires. [24] Of these, Quebec is the only jurisdiction that requires snow tires throughout. [25] Some may require snow tires or chains only in specified areas during the winter. [26] [27] [28]
For many people, all-terrain tires are perfectly acceptable for everyday driving. But if you plan to drive somewhere with icy or snowy terrain, you'll probably need a set of winter tires. Check ...
Rolling resistance is the main key factor in measuring the energy efficiency of a tyre and has direct influence on the fuel consumption of a vehicle. A set of tyres of the green class "A" compared to a "G" class can reduce fuel consumption by 9% [3] of a passenger car; even more for trucks.
ISO 5775 is an international standard for labeling the size of bicycle tires and rims. The system used was originally developed by the European Tyre and Rim Technical Organisation (ETRTO). It is designed to make tire sizing consistent and clear.
Good tires are critical to road safety, and if you live somewhere it snows, you've likely wondered whether winter tires are worth the cost. These expert tips will help you decide.
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