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Choose the right tire #101

Buying a tire should be easy! Between your expectations, your budget and the technical constraints, the margin of maneuver keeps decreasing. Let's see how to choose the right tire in a simple and effective way ...


Note that it may be hazardous to buy tires on a friend's recommendation. They might not be suitable for your vehicle because of the geometry of its suspension or its weight. On each side of the tire there is an inscription like this: P205 / 55R1691T. In detail, the "P" indicates that it is a tire for a passenger vehicle, "205" represents the width of the tire in millimeters, "55" indicates the height-to-width ratio (height represents 55% of the width), the "R" designates the type of tire, ie, a radial, "16" shows the wheel diameter in inches, and finally "91T" specifies the load index and the symbol of the tire. speed rating. You need to find the same registration on your winter tires as on your summer tires.

You can also consult the owner's manual to find out if other dimensions are right for your vehicle. If it is possible to choose tires whose width and aspect ratio are different from those of the original tires, it is strongly suggested that you contact a professional before equipping your vehicle.

Speed Codes

Current suspensions mean that car manufacturers increasingly attach importance to tire speed ratings, ie the maximum speed at which they can ride. You should respect the speed rating recommended by your car builder as much as possible when buying tires as this rating has been set to specific standards. For example, a car with original "H" (210 km / h) speed rating will be less efficient with winter tires rated "Q" (160 km / h). This will impair steering, braking, handling and stability because, among other things, a "Q" tire has softer sides than an "H". On the other hand, winter tires "H" or "V" (240 km / h) are less efficient under difficult conditions. They are, however, suitable for those who do not want to reduce the road behavior of their vehicle in winter because they perform better on asphalt than on snow or ice. To make sure you maximize the performance of winter tires and ride safely, it is important to consult experts in the field!


If the tire has thin sipes, make sure that they reach the bottom of the soleplate. If this is not the case, the performance of the tire will decrease significantly when the blades are no longer there. It should be noted that these slats are particularly effective on the frozen roadway since they were mainly designed for this condition. In addition, to ensure good traction under all circumstances, CAA-Quebec reminds you that the thickness of your tire's tread should be at least about 6/32 of an inch before starting the winter. If in doubt, ask your mechanic to check to make sure you drive safely this winter.

You can also join our support team who will guide you to the most appropriate choices. We are at a call or a click away.