Choosing the right tire size for your 2020 Acura RDX SH-AWD is super important for keeping your ride smooth, safe, and performing at its best. Whether you're cruising around town or hitting the open road, having the correct tires makes all the difference. Let's dive into everything you need to know about finding the perfect tire size for your Acura RDX.

Understanding Tire Sizes

Before we get into the specifics for the 2020 Acura RDX SH-AWD, let's break down what all those numbers and letters on a tire sidewall actually mean. Understanding these markings will help you make an informed decision when it's time to replace your tires. Here's a quick guide:

• Tire Type: The first letter (or letters) indicates the type of tire. 'P' stands for passenger vehicle, meaning it's designed for cars, minivans, and SUVs. 'LT' means light truck, indicating it's designed for pickup trucks and larger SUVs. If there's no letter, it usually means it's a European metric tire.
• Tire Width: This is the width of the tire in millimeters from sidewall to sidewall. For example, a tire with a width of 235 would be 235mm wide.
• Aspect Ratio: This is the ratio of the tire's section height to its width, expressed as a percentage. For instance, a tire with an aspect ratio of 55 means the tire's height is 55% of its width.
• Construction Type: This letter indicates how the tire is constructed. 'R' stands for radial, which is the most common type of tire construction.
• Rim Diameter: This is the diameter of the wheel rim in inches. It tells you what size wheel the tire is designed to fit.
• Load Index: This number represents the maximum weight each tire can carry.
• Speed Rating: This letter indicates the maximum speed at which the tire can operate safely.

Knowing these components allows you to accurately assess and select the correct tire size, ensuring optimal performance and safety for your vehicle. Always consult your vehicle's manual or the tire placard on the driver's side doorjamb for the recommended tire size and specifications.

OEM Tire Size for the 2020 Acura RDX SH-AWD

The Original Equipment Manufacturer (OEM) tire size for the 2020 Acura RDX SH-AWD is typically 235/60R18. This means the tire has a width of 235 millimeters, an aspect ratio of 60, and fits an 18-inch wheel. Acura designed the RDX with these specific dimensions in mind to optimize performance, handling, and ride comfort. Sticking with the OEM size ensures that your vehicle's systems, such as the speedometer and ABS, function correctly.

When you're looking to replace your tires, it's generally a good idea to start with the OEM size unless you have a specific reason to deviate. Using the recommended size guarantees that the tires will fit properly within the wheel wells, avoid any rubbing issues, and maintain the vehicle's intended driving dynamics. However, there might be situations where you consider alternative sizes, which we'll discuss later.

It’s also important to consider the tire's load index and speed rating. These values indicate the maximum weight the tire can support and the maximum speed at which it can safely operate. Ensure that any replacement tires meet or exceed the original specifications to maintain safety and performance. You can find this information in your vehicle's manual or on the tire placard.

Why Tire Size Matters

Tire size isn't just a random number; it significantly impacts your vehicle's performance and safety. Using the correct tire size ensures that your speedometer reads accurately, your anti-lock braking system (ABS) functions properly, and your vehicle handles as intended. Here’s a closer look at why tire size is so crucial:

• Handling and Stability: The right tire size provides the optimal contact patch with the road, which is essential for good handling and stability. A tire that is too wide or too narrow can negatively affect your vehicle's ability to grip the road, especially in wet or slippery conditions. The correct size ensures that your RDX responds predictably to your steering inputs.
• Speedometer Accuracy: Your vehicle's speedometer is calibrated to the OEM tire size. If you change the tire size, it can throw off the accuracy of your speedometer. This means you might be driving faster or slower than what your speedometer indicates, which can lead to speeding tickets or safety issues. Maintaining the correct tire size keeps your speedometer accurate.
• ABS and Traction Control: Modern vehicles rely on precise tire size information for systems like ABS and traction control to function correctly. These systems use wheel speed sensors to detect when a wheel is locking up or slipping. If the tire size is incorrect, these systems might not work as intended, reducing their effectiveness in critical situations.
• Ride Comfort: The aspect ratio of the tire affects the ride comfort. A higher aspect ratio (taller sidewall) generally provides a smoother ride, while a lower aspect ratio (shorter sidewall) can improve handling but may result in a harsher ride. Sticking with the OEM size ensures that you maintain the ride comfort that Acura designed for the RDX.
• Fuel Efficiency: Tire size can also impact fuel efficiency. Larger or wider tires can increase rolling resistance, which means your engine has to work harder to move the vehicle. This can lead to lower fuel economy. Using the correct tire size helps maintain optimal fuel efficiency.

Alternative Tire Sizes

While sticking with the OEM tire size is generally recommended, there might be situations where you consider alternative sizes. Here are a few scenarios and some alternative sizes to consider:

• Plus Sizing: Plus sizing involves increasing the wheel diameter while decreasing the tire's aspect ratio to maintain a similar overall diameter. For example, you might go from an 18-inch wheel to a 19-inch wheel and use a tire with a lower aspect ratio. This can improve handling and give your vehicle a sportier look. However, be mindful of potential ride comfort issues.
• Winter Tires: Some drivers opt for slightly narrower tires in the winter for better traction in snow and ice. A narrower tire can cut through the snow more effectively, providing better grip. Check with tire professionals to ensure the alternative size is safe and appropriate for your vehicle.
• Off-Roading: Although the Acura RDX is not primarily designed for off-roading, some owners might want to use slightly different tires for improved grip on unpaved roads. In this case, a tire with a more aggressive tread pattern might be beneficial. Again, consult with experts to ensure compatibility and safety.

When considering alternative tire sizes, it's essential to stay within a reasonable range of the OEM diameter to avoid issues with speedometer accuracy and ABS functionality. A difference of more than 3% in overall diameter can cause problems. Always consult with a tire professional or use an online tire size calculator to compare different sizes and ensure they are compatible with your vehicle.

Choosing the Right Tires for Your Needs

Selecting the right tires involves more than just finding the correct size. You also need to consider the type of tire, tread pattern, and other factors that can impact performance and safety. Here are some tips for choosing the right tires for your 2020 Acura RDX SH-AWD:

• Tire Type: Consider the type of driving you do most often. All-season tires are a good choice for most drivers, providing a balance of performance in various conditions. Performance tires offer better handling and grip but may not last as long. Winter tires are designed for optimal traction in snow and ice.
• Tread Pattern: The tread pattern affects the tire's ability to grip the road in different conditions. Symmetrical tread patterns are versatile and provide good all-around performance. Asymmetrical tread patterns offer a balance of wet and dry performance. Directional tread patterns are designed for optimal water evacuation and are best suited for wet conditions.
• Load Index and Speed Rating: Ensure that the tires you choose have a load index and speed rating that meets or exceeds the original specifications. This information can be found in your vehicle's manual or on the tire placard.
• Tire Reviews: Read reviews from other drivers to get an idea of how different tires perform in real-world conditions. This can help you narrow down your choices and find tires that meet your specific needs.
• Consult a Professional: When in doubt, consult with a tire professional. They can provide expert advice and help you choose the right tires for your vehicle and driving style.

Where to Buy Tires

You have several options when it comes to buying tires for your 2020 Acura RDX SH-AWD. Here are some common places to consider:

• Local Tire Shops: Local tire shops often offer personalized service and can help you choose the right tires for your vehicle. They may also offer installation and balancing services.
• Dealerships: Acura dealerships are a reliable source for OEM tires and can ensure that you get the correct size and specifications. They also have trained technicians who can install and balance the tires.
• Online Retailers: Online retailers offer a wide selection of tires at competitive prices. However, you'll need to arrange for installation and balancing separately.
• Big Box Stores: Big box stores like Costco and Sam's Club often offer good deals on tires and may include installation and balancing services.

Maintaining Your Tires

Proper tire maintenance is essential for prolonging the life of your tires and ensuring your safety on the road. Here are some tips for maintaining your tires:

• Check Tire Pressure Regularly: Check your tire pressure at least once a month and before long trips. Use a reliable tire pressure gauge and inflate your tires to the recommended pressure, which can be found on the tire placard or in your vehicle's manual.
• Rotate Your Tires: Rotate your tires every 6,000 to 8,000 miles to ensure even wear. This helps prolong the life of your tires and maintain optimal handling and traction.
• Inspect for Wear and Damage: Regularly inspect your tires for signs of wear and damage, such as cuts, bulges, or uneven wear patterns. If you notice any problems, have your tires inspected by a professional.
• Balance Your Tires: Have your tires balanced when you get them installed and periodically thereafter. Balanced tires provide a smoother ride and help prevent uneven wear.
• Align Your Wheels: Proper wheel alignment is essential for even tire wear. If you notice that your vehicle is pulling to one side or your tires are wearing unevenly, have your wheels aligned by a professional.

By following these maintenance tips, you can help ensure that your tires last longer and provide optimal performance and safety.

Conclusion

Choosing the right tire size for your 2020 Acura RDX SH-AWD is a crucial decision that impacts your vehicle's performance, safety, and ride comfort. Sticking with the OEM size of 235/60R18 is generally recommended, but there might be situations where you consider alternative sizes. Always ensure that any replacement tires meet or exceed the original specifications for load index and speed rating. By understanding tire sizes, considering your driving needs, and following proper maintenance practices, you can ensure that your Acura RDX performs at its best and keeps you safe on the road.