2018 WRX STI Tire Size Overview
When it comes to the 2018 WRX STI, choosing the right tire size is crucial for performance, handling, and safety. The STI is known for its rally heritage and aggressive stance, and the right tires play a significant role in how it performs on the road and track. Let’s break down the tire sizes available for different trims of the 2018 WRX STI.
Stock Tire Sizes by Trim
The 2018 WRX STI comes in several trims, each with specific tire size recommendations. Below is a table summarizing the stock tire sizes for each trim:
| Trim Level | Front Tire Size | Rear Tire Size |
|---|---|---|
| Base | 245/40R18 | 245/40R18 |
| Limited | 245/40R18 | 245/40R18 |
| Type RA | 245/40R18 | 245/40R18 |
Understanding Tire Size Notation
Let’s break down what those numbers mean. The tire size is expressed in a format like 245/40R18:
- 245 – This is the tire’s width in millimeters from sidewall to sidewall.
- 40 – This is the aspect ratio, representing the height of the sidewall as a percentage of the tire’s width. In this case, the sidewall height is 40% of 245 mm.
- R – This indicates that the tire is of radial construction, which is standard for modern tires.
- 18 – This is the diameter of the wheel in inches that the tire is designed to fit.
Why Tire Size Matters
Choosing the correct tire size for your 2018 WRX STI is not just about aesthetics; it directly affects performance and safety. Here are some factors to consider:
- Handling: The right tire size ensures optimal grip and stability, especially when cornering at high speeds.
- Ride Quality: Tires that are too wide or narrow can lead to a harsh ride or excessive road noise.
- Speedometer Accuracy: Using the wrong tire size can throw off your speedometer readings, leading to potential legal issues.
- Fuel Efficiency: Incorrect tire sizes can affect your fuel economy, either improving or hindering it.
In summary, the stock tire size for the 2018 WRX STI across all trims is 245/40R18. Stick with this size unless you have a specific reason to change, such as performance upgrades or personal preference. Always consult with a professional if you’re considering any modifications to ensure you’re making the right choice for your driving needs.
Exploring the Smallest and Biggest Tire Sizes for the 2018 WRX STI
When it comes to the 2018 WRX STI, tire size can significantly impact performance, handling, and overall driving experience. While the stock tire size is 245/40R18, enthusiasts often discuss the pros and cons of going smaller or larger. Let’s dive into the smallest and biggest tire sizes that owners have experimented with, based on feedback from forums and owner experiences.
Smallest Tire Size Options
Some owners have explored smaller tire sizes for various reasons, including weight savings, improved acceleration, or a desire to enhance ride comfort. However, going too small can lead to handling issues and reduced grip. Here are some of the smallest tire sizes that have been discussed:
- 235/40R18: This size is a common choice among owners seeking a slight reduction in width. It can provide a bit more comfort while still maintaining decent performance.
- 225/40R18: A narrower option that some have recommended for those looking for a softer ride. Be cautious, though; this size can impact cornering stability.
Pros and Cons of Smaller Tires
- Pros:
- Improved ride comfort due to a smaller contact patch.
- Potentially lighter, which can enhance acceleration.
- Cons:
- Reduced grip, especially in high-speed cornering.
- Speedometer inaccuracies may occur.
Biggest Tire Size Options
On the flip side, some owners have opted for larger tire sizes to enhance grip and performance. Bigger tires can provide a wider contact patch, improving traction on both the street and the track. Here are some of the largest tire sizes that enthusiasts have discussed:
- 255/35R18: This size is popular among those looking to maximize grip without going overboard. It fits well on the stock wheels and can significantly improve cornering performance.
- 265/35R18: A more aggressive option that some owners have experimented with. This size offers excellent grip but may require a bit of fender rolling to avoid rubbing.
Pros and Cons of Larger Tires
- Pros:
- Increased grip and stability during high-speed maneuvers.
- Improved aesthetic appeal with a wider stance.
- Cons:
- Potential for a harsher ride due to a stiffer sidewall.
- Increased road noise and possible impact on fuel efficiency.
Best Tires Based on Owner Feedback
When it comes to choosing the best tires for the 2018 WRX STI, owner feedback is invaluable. Here’s a roundup of some of the most recommended tires based on discussions in forums and owner reviews:
- Michelin Pilot Sport 4S: Known for its exceptional grip and handling capabilities, this tire is a favorite among performance enthusiasts.
- Continental ExtremeContact Sport: Offers a great balance of performance and comfort, making it a versatile choice for daily driving and spirited runs.
- Bridgestone Potenza RE-71R: This tire is often praised for its track performance, providing incredible grip and responsiveness.
- Goodyear Eagle F1 Supercar 3: A solid option for those looking for a tire that performs well in both wet and dry conditions.
Things to Consider When Choosing Tires
When selecting tires for your WRX STI, keep the following factors in mind:
- Driving Style: Consider how you plan to use your vehicle. Are you mostly on the street, or do you hit the track?
- Weather Conditions: If you live in an area with heavy rain or snow, consider tires that excel in those conditions.
- Budget: High-performance tires can be pricey, so determine what you’re willing to spend.
In the end, whether you’re considering smaller or larger tire sizes for your 2018 WRX STI, it’s essential to weigh the pros and cons and choose what aligns best with your driving needs and style. Always consult with a trusted tire professional if you’re unsure about making changes to your tire setup.