The correct tire for your vehicle will be a unique combination of different variables including the width, height, and diameter of the tire, as well as a combination the tire’s load capacity rating and speed ability. To find out what size tires you need and what speed/load rating your vehicle requires, check your owner’s manual. If the information is not listed there, it can usually be found inside the door jamb of the driver’s door, inside the glove box door, or inside the fuel tank hatch.

If you cannot find the information in any of these locations, read the information off of the sidewall on your existing tires. Here is an example of the types of numbers you want to look for:

You can write all these numbers down and then bring them to Canadian Auto Service Repairs and Tire Shop to see what tires are available in this size. That is all the information you will need to find tires that will fit your car as the manufacturer intended.

What Do the Numbers on The Sidewall Actually Mean?

Aspect ratio: The aspect ratio is essentially a measure of how tall your tire is. The larger the number, the taller the tire. The number is calculated by dividing the height of the tire by its width, then turning the result into a percentage. Your typical all-season passenger car tire will have an aspect ratio somewhere between 65 and 80.

Load index: Your tire’s load index lets you know how much weight the tire was designed to carry safely. By using the load index chart displayed below, you can match the rating up with the number of pounds the tire can support when it is inflated to its maximum air pressure. For example, if your load rating is 81, you can then determine that the tire was engineered to carry 1,019 pounds when fully inflated. Multiply this weight by four to find out the maximum carrying capacity for your vehicle. When buying aftermarket or replacement tires, it is important to find a model that matches the load index that was on the original equipment.


Speed rating: The speed rating is a number issued by the U.S. government which signifies how well a tire can reach and maintain a certain speed. Speed ratings are simply lettering which correspond to a specific top speed. Keep in mind that these are not recommended speeds to drive at, but simply a way to get a better idea of how well the tire will handle (tires with a hire speed rating are likely to provide better traction and handling). When buying new tires, always choose 4 tires with identical speed ratings. Mixing up the specifications on your tires will result in serious and unsafe driving conditions. It is also not recommended that you downgrade the speed rating on your tires. Always follow the manufacturer’s guidelines and buy tires with ratings that are identical to the original stock equipment.


Once you have all the information from your tire sidewall or vehicle placard, you can now narrow down your search for new tires. Other variables like tread wear, traction, and temperature grades may affect the type of tires you need, but for everyday purposes the size, speed, and load numbers are all you will need. Contact Canadian Auto Service Repairs and Tire Shop for more information about the different types of tires. We will assist you in finding the tires you want at the sizes you need.

Great Deals in St Albert, AB on Tire brands that are available to us; Michelin, Uniroyal, Yokohama, Pirelli, Toyo, Kleber, Rakla, Nexen, Kelly tires, Goodyear, Samson, Laufenn, Kenda, BFGoodrich, Bridgestone, Continental, Dick Cepek, Dunlop, Falken, Fierce, Fuzion, GT Radial, Starfire, Firestone, Mickey Thompson, Hercules tires, General tire, Ironman, Westlake tires, Cooper tires, kumho Tire, Nitto, Hankook, Dayton, Nankang, Titan, Sumitomo Tire.

Canadian Auto Service Repairs and Tire Shop proudly serves the St. Albert, Edmonton, Spruce Grove, Stony Plain, Sherwood Park, Morinville, Fort Saskatchewan, Devon, Leduc, and surrounding metropolitan areas! From imports, domestic, sports vehicles, trucks, SUV’s, sedans, minivans, convertibles, all makes and models like, Acura, Audi, BMW, Buick, Chevrolet, Cadillac, Chrysler, Dodge, Fiat, Ford, General Motors, Honda, Hyundai, Infiniti, Jeep, Kia, Volvo, Lincoln, Land Rover, Lexus, Mazda, Mercedes Benz, Mini, Mitsubishi, Nissan, Porsche, Ram, Subaru, Toyota, and Volkswagen.

Shop with Confidence! Great Place | Great Service | Great Prices| Great People!

We are family owned & operated, automotive experience since 1988!

Low overhead means better deals for you!

Canadian Auto Remarketing (CAR) LTD AMVIC Licensed Dealer and a Chamber of Commerce Member.

Canadian Auto approved, and licensed facility is equipped to perform at least the following services:

  • Auto glass repair and replacement
  • Automatic transmission repair
  • Battery service and replacement
  • Brake service and repair
  • Electrical systems repair.
  • Electronics and fuel injection
  • Engine tune-up
  • Heating and air conditioning repair
  • Major engine repairs and rebuilding
  • Manual transmission and rear axle repair
  • Minor engine repair and routine servicing
  • Oil changes
  • Tires, steering, alignments and suspension.

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Canadian Auto Remarketing is an AMVIC Licensed/Bonded Auto Dealership and a St Albert Chamber of Commerce member.

Shop with Confidence! Great Place | Great Service | Great Prices | Great People. One stop destination for all vehicle needs! Buy | Sell | Trade | Finance | Cars | Trucks | SUV’s | Minivans | Licensed Automotive Service Repair facility | Licensed Out-of-Province inspection facility | Mechanical Inspections | Lube/Oil/Filter Services | Wheels & Tires | Auto Accessories | Custom Auto Detailing | Mechanical Breakdown Protection Approved facility | Windshield Repairs and much more.

We are a Canadian owned and operated Automotive dealership, with automotive experience since 1988.

Showroom location in St Albert, two blocks north of the Anthony Henday Drive with easy access.

# 109 – 25 Chisholm Avenue. St Albert, AB. Canada. T8N 5A5

Bus: (780) 569-0654 | Fax: (780) 569-0655 | Mobile/Text: (780) 994-2032


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