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What Size & Speed Rating do I Need for All Season Tires?

If you’re in the market for a new set of all season tires for your vehicle, there are a number of things you need to consider. Of these factors, the most important may be determining the proper size and speed rating for your vehicle’s all season tires. Different speed ratings and sizes can result in vastly different driving experiences, which is why it’s so important to understand the combination that is perfect for you and your needs. Once you have this information, you’ll be ready to make your purchase at your local TIRECRAFT .


First Thing First, What is a Speed Rating? 

Speed ratings for tires are designed to help drivers know their limits. These ratings were introduced after years of tire blowouts at high speeds on roadways around the world. Over time, speed ratings have evolved, and they are now used to provide a driver with information including:

  • How well a tire grips, corners, and brakes
  • A tire’s ability to deal with heat
  • The responsiveness of a tire

Speed ratings are based on the compound of the rubber used in the tire, as well as the tread stability and overall design and construction. A tire with a high speed rating is going to be better equipped for dealing with heat, which can be very beneficial in the summer. Additionally, you will find that all season tires with a higher speed rating will be more capable of breaking at short distances, cornering at higher speeds, and will be more responsive when steering.

Size Matters 

Your vehicle is by no means light. When you consider that even a compact car weighs a great deal, it becomes more clear how important it is that your tires are able to properly support it. If your tires are too small for your vehicle, you’re putting yourself and your passengers at risk, and potentially cause an emergency situation.

Tire size is determined by measuring the width of the (in millimetres) from sidewall to sidewall. The aspect ratio of a tire is the height of the tire’s cross-section, relative to its width. The larger the aspect ratio, the larger your tire’s sidewall will be. The wheel diameter is the size of the wheel as measured from one end of the wheel to the other end. So, for example, if your tire size is P195/65 R15, your tire’s width is 195 millimetres, while the tire’s height is equal to 65% of the tire’s width. Finally the tire will fit on wheel with a 15″ diameter.

It’s worth noting that while the correct all season tire size is crucial, most vehicles are designed so you can choose tires up to 15% larger than the manufacturer’s suggested sizing. While making this choice will obviously come down to personal preference, it’s important to discuss all of your options with the professionals at TIRECRAFT  if you have any questions.

Which Speed Rating and Size is Right for You?

There’s no right or wrong answer to this question, as long as the speed rating and size within the correct range for your vehicle. The type of vehicle you own, the type of driving you plan on doing, and your budget will all play a role in determining the all season tires that are right for you. For example, if you have a faster car and are interested in flexing its muscles, you may want to choose a tire with a speed rating of U or higher. On the other hand, if you’re looking for practical tires to put on your daily driver, you may want to look into tires with a speed rating of N.

At the end of the day, your best bet is to stop by your local TIRECRAFT to speak with one of our experts. Based on the information you provide, our team can help you find all season tires that will keep your vehicle in great shape. To get started on finding the all season tires with the right speed and size rating for you, find your tires today!