So, you're the proud owner of a 2018 Subaru WRX Premium, and you're probably wondering about the right tire size for your ride. Well, you've come to the right place! Finding the perfect tire size is crucial for maintaining your WRX's performance, handling, and overall safety. This article will dive deep into everything you need to know about the 2018 Subaru WRX Premium tire size, exploring the standard options, alternatives, and factors to consider when making your choice.

Understanding the Stock Tire Size

Let's kick things off by identifying the stock tire size for your 2018 Subaru WRX Premium. The standard tire size is 235/45R17. Let's break down what each of these numbers means:

• 235: This indicates the tire's section width in millimeters. It essentially measures the width of the tire from sidewall to sidewall.
• 45: This is the aspect ratio, representing the height of the tire's sidewall as a percentage of its section width. In this case, the sidewall height is 45% of 235mm.
• R17: This signifies the wheel diameter in inches. Your WRX Premium is designed to use 17-inch wheels.

Sticking with the stock tire size ensures that your car's speedometer, odometer, and other systems function correctly. It also guarantees that the tires will fit properly within the wheel wells without any rubbing or clearance issues. However, there are situations where you might consider alternative tire sizes, which we'll explore later.

When considering replacements, it's important to factor in not just the size but also the tire type. Are you looking for all-season tires for year-round driving, performance tires for enhanced grip, or winter tires for snowy conditions? Each type has its own advantages and disadvantages depending on your driving needs and climate. Don't underestimate the importance of reading reviews and comparing different brands to find tires that offer the best combination of performance, durability, and value for your specific situation. Remember, your tires are the only point of contact between your car and the road, so choosing wisely is paramount for safety and overall driving enjoyment.

Furthermore, consider the load index and speed rating of the tires. These values indicate the maximum weight each tire can carry and the maximum speed at which it can safely operate. Ensure that the tires you choose meet or exceed the original specifications for your 2018 Subaru WRX Premium to maintain optimal safety and performance. Consulting with a tire professional can provide personalized recommendations based on your driving habits and local conditions, ensuring that you make an informed decision that meets all your needs and keeps you safe on the road.

Exploring Alternative Tire Sizes

While the stock size is a safe bet, some WRX owners opt for alternative tire sizes to achieve a specific look or performance characteristic. However, it's crucial to approach this with caution and knowledge. Changing tire sizes can affect various aspects of your car's behavior, including handling, acceleration, braking, and even fuel economy.

One common alternative is to slightly increase the tire width, for example, to a 245/40R17. This can provide a wider contact patch, potentially improving grip and cornering performance. However, it's essential to ensure that the wider tires don't rub against the suspension components or fender liners, especially during turns or when the suspension is compressed. You'll also want to verify that the wheel offset is appropriate for the wider tires to maintain proper clearance.

Another consideration is the overall tire diameter. Changing the diameter can affect your speedometer reading and the car's gearing. A larger diameter tire will result in a lower speedometer reading and effectively lengthen the gear ratios, which can slightly reduce acceleration. Conversely, a smaller diameter tire will increase the speedometer reading and shorten the gear ratios, potentially improving acceleration but reducing top speed. It's generally recommended to stay within 3% of the original tire diameter to minimize these effects.

Before making any changes, it's a good idea to consult with a tire specialist or do some research on online forums dedicated to Subaru WRXs. These resources can provide valuable insights and experiences from other owners who have experimented with different tire sizes. They can also offer advice on potential fitment issues and the best way to address them. Remember, the goal is to enhance your car's performance and appearance without compromising safety or reliability. Making informed decisions based on solid research and expert advice is the key to achieving the desired results.

Factors to Consider When Choosing Tires

Choosing the right tire size is just one piece of the puzzle. Several other factors come into play when selecting the best tires for your 2018 Subaru WRX Premium. Let's take a closer look:

• Driving Conditions: Consider the typical weather conditions in your area. If you experience harsh winters, winter tires are a must. For warmer climates, performance or all-season tires might be a better choice.
• Driving Style: Are you an aggressive driver who enjoys pushing your WRX to its limits? If so, performance tires with excellent grip and handling characteristics would be ideal. If you prioritize comfort and fuel efficiency, all-season tires might be a better fit.
• Tire Type: As mentioned earlier, different tire types cater to different needs. All-season tires offer a balance of performance and versatility, while performance tires prioritize grip and handling. Winter tires provide superior traction in snow and ice.
• Budget: Tire prices can vary significantly depending on the brand, type, and size. Set a budget and try to find the best tires that fit your needs without breaking the bank. Look for deals and discounts, but don't compromise on quality for the sake of saving a few bucks.

Beyond these factors, it's also crucial to consider the tire's treadwear rating, which indicates its expected lifespan. A higher treadwear rating generally means the tire will last longer, but it may also sacrifice some grip. Read reviews and compare different brands to get a sense of their reputation for durability and performance. Pay attention to the tire's warranty as well, as it can provide some protection against defects or premature wear.

Finally, don't underestimate the importance of proper tire maintenance. Regularly check your tire pressure and keep your tires properly inflated to the recommended levels. This will not only improve fuel efficiency and handling but also extend the life of your tires. Rotate your tires regularly to ensure even wear and prevent premature replacement. By taking good care of your tires, you can maximize their performance and get the most out of your investment.

The Importance of Tire Pressure

Maintaining the correct tire pressure is extremely important for your 2018 Subaru WRX Premium. The recommended tire pressure can usually be found on a sticker located on the driver's side doorjamb or in your owner's manual. Using the correct tire pressure ensures optimal handling, braking, and fuel efficiency. Overinflating or underinflating your tires can lead to uneven wear, reduced grip, and even tire failure.

Check your tire pressure regularly, especially when the temperature changes significantly. As the temperature drops, tire pressure decreases, and vice versa. Invest in a good quality tire pressure gauge and make it a habit to check your tires at least once a month. It only takes a few minutes, and it can save you money and prevent potential accidents.

When checking tire pressure, make sure to do it when the tires are cold, meaning they haven't been driven on for at least a few hours. Driving heats up the tires and increases the pressure, which can give you an inaccurate reading. If you have to check your tires after driving, add a few PSI to compensate for the heat.

Proper tire inflation is not just about safety and performance; it also affects your wallet. Underinflated tires increase rolling resistance, which means your engine has to work harder to move the car. This results in reduced fuel efficiency and increased fuel consumption. By keeping your tires properly inflated, you can save money on gas and reduce your carbon footprint.

Where to Buy Tires

Alright, so where should you buy tires for your 2018 WRX Premium? You've got a few options. You can hit up your local tire shop, a big chain like Discount Tire or Tire Rack, or even order online from Amazon or other retailers.

Local tire shops often offer personalized service and can help you choose the right tires for your needs. They can also handle the installation and any necessary maintenance. However, their prices might be slightly higher compared to online retailers.

Big chains like Discount Tire and Tire Rack typically have a wide selection of tires at competitive prices. They also offer installation services and often have promotions and discounts. Online retailers like Amazon can offer even lower prices, but you'll need to arrange for installation yourself.

No matter where you choose to buy your tires, make sure to do your research and read reviews before making a purchase. Compare prices and look for deals, but don't compromise on quality for the sake of saving a few bucks. Remember, your tires are a crucial safety component, so it's worth investing in a good set.

Final Thoughts

Choosing the right tire size for your 2018 Subaru WRX Premium is crucial for maintaining its performance, handling, and safety. Stick with the stock size of 235/45R17 for a hassle-free experience, or explore alternative sizes with caution and proper research. Consider your driving conditions, driving style, and budget when making your decision, and don't forget to maintain proper tire pressure. With the right tires, your WRX will continue to provide you with years of driving pleasure!

So there you have it, folks! Everything you need to know about 2018 Subaru WRX Premium tire sizes. Now get out there and find the perfect rubber for your ride!