2017 Lexus RX 350 AWD Tire Size Guide

by Alex Braham 38 views

Hey everyone! If you're rolling in a 2017 Lexus RX 350 AWD and wondering about the right tire size, you've come to the right place, guys! Getting the correct tires for your ride is super important, not just for how it looks, but for safety, performance, and even how long your car lasts. So, let's dive deep and figure out exactly what you need for your specific model. We'll cover the factory specs, what happens if you go a bit bigger, and why it all matters so much.

Understanding Your 2017 Lexus RX 350 AWD Tire Size

First things first, let's talk about the factory-recommended tire size for your 2017 Lexus RX 350 AWD. Lexus is pretty specific about what works best with their vehicles, and for this particular model year and trim, the most common factory tire size you'll find is 235/55R20. Now, what does this string of numbers and letters actually mean? Let's break it down, because understanding this will make you a tire-choosing pro!

  • 235: This number represents the width of the tire in millimeters. So, 235mm is the measurement from one sidewall to the other. A wider tire generally offers better grip and handling, but can sometimes affect fuel economy.
  • 55: This is the aspect ratio of the tire. It's a percentage that tells you how tall the sidewall is compared to the tire's width. In this case, the sidewall height is 55% of the 235mm width. A lower aspect ratio usually means a shorter, stiffer sidewall, which can improve steering response and cornering stability, but might give a firmer ride.
  • R: This simple letter stands for Radial. Almost all modern car tires are radial, meaning the internal construction has cords running radially across the tire.
  • 20: This is the diameter of the wheel that the tire is designed to fit, measured in inches. So, your 2017 RX 350 AWD comes with 20-inch wheels from the factory.

So, when you see 235/55R20, it's a complete picture of the tire's dimensions. Sticking to this size ensures that your speedometer and odometer are accurate, your anti-lock braking system (ABS) and traction control systems work as intended, and the vehicle handles the way the engineers designed it to. It's the safest and most reliable bet, especially if you're not looking to make any modifications. It maintains the vehicle's original balance, ride comfort, and fuel efficiency. Plus, finding tires in this standard size is usually pretty easy and affordable.

Why Does the Correct Tire Size Matter So Much?

Okay, guys, let's get real for a second. Why all the fuss about tire size? It’s not just about looking cool, though that’s part of it, right? The correct tire size is absolutely crucial for several reasons, and messing it up can lead to some serious headaches. Think of your tires as the only thing connecting your massive SUV to the road. If that connection isn't right, nothing else is going to perform as it should.

First off, safety. Your vehicle's safety systems, like ABS and electronic stability control (ESC), are calibrated to work with specific tire sizes. If you put on tires that are significantly different in diameter or width, these systems might not function correctly. Imagine slamming on the brakes and your ABS doesn't engage properly because it thinks the wheels are spinning at a different rate than they actually are. Not good, folks. Similarly, if the overall diameter of your tire changes, your speedometer and odometer will be off. You might be driving faster than you think, or your mileage records will be incorrect. This can lead to speeding tickets or issues with lease agreements or resale value.

Next up is performance and handling. The engineers at Lexus spent a ton of time figuring out the perfect tire size to give the RX 350 AWD that smooth, comfortable, yet capable ride it's known for. The suspension, steering, and all-wheel-drive system are all tuned with those original tire dimensions in mind. Changing the tire size can alter the vehicle's center of gravity, affect how it corners, and even impact its ability to handle different road conditions. If you go with tires that are too wide, you might experience rubbing issues inside the wheel well, especially during turns or when the suspension compresses. Too narrow, and you might lose grip. The aspect ratio also plays a huge role – a lower profile tire (smaller aspect ratio) will give you a harsher ride because there's less rubber and air to absorb bumps. A higher profile tire will be softer but might feel less precise when you're steering.

Then there's the fuel efficiency. Larger, heavier, or wider tires can increase rolling resistance, meaning your engine has to work harder to keep the vehicle moving. This translates directly into burning more fuel, which nobody wants, especially with today's gas prices. The EPA estimates for fuel economy are based on the factory tire size, so going off-spec will likely mean you won't hit those numbers.

Finally, let's not forget about wear and tear. Improperly sized tires can put extra strain on your suspension components, wheel bearings, and drivetrain. Uneven tire wear is also a common issue when you deviate from the recommended size. You might find yourself buying new tires more often, which isn't exactly budget-friendly. So, for optimal safety, performance, fuel economy, and longevity of your vehicle, always aim to stick as closely as possible to the manufacturer's recommended tire size.

Can You Change Your Tire Size on a 2017 Lexus RX 350 AWD?

Alright, so you've got your 235/55R20s, and you're thinking, "Can I go a little bigger? Maybe something that looks more aggressive or gives me a bit more ground clearance?" It's a common question, guys, and the answer is yes, you can, but you've got to be super careful about it. It's not as simple as just slapping on whatever looks good. There's a science to it, and if you get it wrong, you're gonna have problems. We're talking about maintaining the overall diameter of the tire, which is the golden rule here.

When you're considering a different tire size, the most important thing is to keep the overall diameter of the new tire as close as possible to the original 235/55R20. Why? Remember what we just talked about: speedometer accuracy, ABS/ESC function, and vehicle dynamics. Changing the overall diameter throws all of that off. So, if you want to go wider, you might need to go with a slightly lower aspect ratio (the second number) to compensate. If you want a taller tire for more sidewall, you might need to go slightly narrower.

Let's look at an example. Suppose you want a slightly wider tire for better grip. You might consider a 245/50R20. Let's check the diameters:

  • Original: 235/55R20

    • Width: 235mm
    • Sidewall Height: 235 * 0.55 = 129.25mm
    • Overall Diameter: (129.25mm * 2) + (20 inches * 25.4 mm/inch) = 258.5mm + 508mm = 766.5mm

  • Potential Upgrade: 245/50R20

    • Width: 245mm
    • Sidewall Height: 245 * 0.50 = 122.5mm
    • Overall Diameter: (122.5mm * 2) + (20 inches * 25.4 mm/inch) = 245mm + 508mm = 753mm

In this example, the 245/50R20 is slightly smaller in overall diameter (about 1.7% difference). This is usually acceptable and within the range where most vehicle systems will still function correctly. However, you must also check for clearance issues. Will the wider tire rub against the fender liner, suspension components, or brake components? This is especially important on an AWD vehicle where the rotational speed of all four wheels needs to be closely matched. If tires rub, it can damage the tire and potentially the vehicle.

Another common consideration is going up in wheel size, like to 22 inches. If you go to a 22-inch wheel (e.g., 265/40R22), you need to ensure the overall diameter remains similar. Let's check:

  • Potential Upgrade: 265/40R22
    • Width: 265mm
    • Sidewall Height: 265 * 0.40 = 106mm
    • Overall Diameter: (106mm * 2) + (22 inches * 25.4 mm/inch) = 212mm + 558.8mm = 770.8mm

This 265/40R22 is slightly larger in diameter (about 2.5% difference). This might be pushing it and could affect speedometer accuracy and potentially trigger warning lights. Plus, larger wheels with lower profile tires often mean a harsher ride and potentially more susceptibility to damage from potholes. You also need to consider the load index and speed rating. Ensure the new tires have a load index equal to or greater than the original tires to safely support the weight of your RX 350. The speed rating should also be adequate for the vehicle's capabilities.

The key takeaway here is to use an online tire size calculator. You can input your current tire size and your desired tire size, and it will tell you the difference in diameter, circumference, and revolutions per mile. Aim for a difference of less than 3% in overall diameter. Always check for physical clearance by turning the steering wheel lock-to-lock with the new tires mounted, and ideally, test drive it gently to listen for any rubbing sounds.

Where to Find Your Tire Size Information

Now, if you're still feeling a bit unsure, or you just want to double-check, there are a few super easy places to find the exact tire size information for your 2017 Lexus RX 350 AWD. No need to guess, guys!

  1. Driver's Side Doorjamb Sticker: This is the most reliable place. Open up the driver's door, and look at the sticker on the door frame or the edge of the door itself. It's usually a white and yellow label that lists the original tire size, recommended tire pressure, and sometimes even wheel offset information. It’s basically the manufacturer's stamp of approval for what fits and works best.
  2. Owner's Manual: Your trusty owner's manual is a treasure trove of information. Flip to the section on wheels and tires. It will clearly state the recommended tire sizes for your specific model and trim level. It’s a great resource for understanding all aspects of your vehicle's maintenance.
  3. Tire Sidewall: Of course, the tires currently on your car will tell you their size! Just look at the series of numbers and letters we broke down earlier (e.g., 235/55R20). This is helpful to confirm what's currently installed, but remember, they might not be the original factory size if a previous owner made a change.
  4. Online Resources: Many reputable tire retailer websites have a tool where you can enter your vehicle's year, make, and model, and it will list the compatible tire sizes. Just be sure to cross-reference this with the other methods to be absolutely sure.

By checking these sources, you can be confident you're getting the right tire size for your 2017 Lexus RX 350 AWD. This ensures your vehicle performs safely and efficiently, just as the Lexus engineers intended.

Choosing the Right Tires for Your 2017 Lexus RX 350 AWD

So, we've established the correct tire size for your 2017 Lexus RX 350 AWD is likely 235/55R20, and we've talked about the importance of sticking to it or making careful changes. Now, let's chat about what kind of tires you should be looking for. Guys, the world of tires can be a bit overwhelming, with so many brands and types out there, but choosing the right ones can seriously upgrade your driving experience. Since the RX 350 AWD is a luxury SUV often used for daily commutes, family trips, and maybe the occasional light off-road adventure, you'll probably want to focus on tires that offer a good balance of comfort, performance, and all-weather capability.

All-Season vs. Summer vs. Winter Tires

This is a big one. Your climate and driving habits will dictate which tire type is best for you. For most owners of a 2017 Lexus RX 350 AWD, all-season tires are going to be the go-to choice. They're designed to provide a decent performance across a wide range of temperatures and conditions – light snow, rain, dry pavement. They offer a good compromise, meaning you don't have to swap your tires out twice a year. Look for ones with the M+S (Mud and Snow) designation. They typically have a tread compound that remains flexible in colder temperatures and a tread pattern that can evacuate water and provide grip in light snow. Brands like Michelin (e.g., Premier LTX, Defender LTX M/S), Continental (e.g., CrossContact LX25), Bridgestone (e.g., Dueler H/L Alenza Plus), and Pirelli offer excellent all-season options in the 235/55R20 size.

Summer tires, on the other hand, are all about maximum performance on dry and wet roads in warmer temperatures. They use a stickier rubber compound and have tread patterns optimized for grip and handling during spirited driving. However, their performance drops significantly in cold weather, and they offer very little traction in snow or ice. If you live in a region with consistently warm weather year-round and prioritize sporty handling, these might be an option, but for most RX 350 owners, they're not practical.

Winter tires are a must-have if you live in an area with harsh winters and significant snowfall or ice. They use special rubber compounds that stay soft and grippy even in freezing temperatures, and their aggressive tread patterns are designed to bite into snow and ice for superior traction. If you frequently drive in snowy conditions, investing in a set of winter tires (often mounted on a separate set of wheels) is one of the best safety decisions you can make. You'd typically look for a size like 235/55R20 or potentially a slightly narrower winter tire if available for better snow traction.

Key Tire Features to Look For

Beyond the type, consider these features when shopping for your 235/55R20 tires:

  • Ride Comfort: Since the RX 350 is a luxury vehicle, you probably value a smooth and quiet ride. Look for tires that specifically advertise noise reduction technology and comfortable cushioning. Reviews often highlight which tires excel in this area.
  • Tread Life: Tires aren't cheap, so getting ones that last is important. Check the treadwear rating (the first number in the UTQG rating on the sidewall, higher is better) and the manufacturer's mileage warranty. Premium brands often offer longer-lasting tires.
  • Fuel Efficiency: Some tires are designed with low rolling resistance to help improve your MPG. This might be a lower priority than comfort or tread life for an RX 350, but it's still a factor worth considering.
  • Wet Traction: Crucial for safety, especially in rainy conditions. Look for tires with good ratings for wet grip and hydroplaning resistance. Many all-season tires are specifically designed to channel water away effectively.
  • Handling and Braking: While comfort is key, you still want your SUV to feel stable and responsive. Tires with good handling characteristics will provide confident steering and shorter braking distances.

Reputable Brands and Where to Buy

When it comes to 2017 Lexus RX 350 AWD tires, sticking with well-known, reputable brands is generally a safe bet. Companies like Michelin, Bridgestone, Continental, Pirelli, Goodyear, and Yokohama have a long history of producing high-quality tires for luxury SUVs. They invest heavily in research and development, ensuring their tires meet high standards for safety, performance, and durability.

  • Michelin: Often considered a benchmark for performance, comfort, and longevity. Their Defender LTX M/S or Premier LTX are popular choices for SUVs like the RX 350.
  • Bridgestone: Known for their durability and reliable performance. The Dueler series is a strong contender.
  • Continental: Offer a great balance of comfort, quietness, and all-season traction.
  • Pirelli: While sometimes associated with performance cars, they also make excellent SUV tires that offer a premium feel and capability.

As for where to buy, you've got a few solid options:

  • Online Retailers: Sites like Tire Rack, Discount Tire Direct, and Amazon offer a vast selection, competitive pricing, and often detailed customer reviews. You can have them shipped directly to you or to a local installer.
  • Local Tire Shops: Independent tire shops and national chains (like Discount Tire, America's Tire, NTB) provide expert advice, installation services, and often same-day availability. It's great to support local businesses too!
  • Dealerships: Your Lexus dealership will undoubtedly have the correct size and likely OEM (Original Equipment Manufacturer) options. This is often the most expensive route, but guarantees a perfect fit and factory-spec tires.

No matter where you buy, always compare prices, check for deals or rebates, and factor in the cost of installation, mounting, balancing, and any potential alignment checks. Getting the right tires installed correctly is just as important as picking the right ones!

Final Thoughts on Your 2017 Lexus RX 350 AWD Tires

Alright guys, we've covered a lot of ground on the tire size for your 2017 Lexus RX 350 AWD! Remember, the factory standard is usually 235/55R20, and sticking close to this size is the best way to ensure your SUV runs safely, efficiently, and smoothly. We've seen how crucial tire size is for your vehicle's performance, safety systems, and even your wallet. It's not just a number; it's the foundation of your driving experience.

If you're thinking about changing the size, always prioritize keeping the overall diameter consistent and watch out for clearance issues. Use those online calculators and don't hesitate to ask a professional tire shop for advice. They deal with this stuff every day and can help you find the perfect fit, whether you're sticking to the OEM size or venturing slightly out.

Choosing the right type of tire – whether it's all-season, summer, or winter – is also key to matching your driving needs and climate. Prioritize features like comfort, tread life, and all-weather traction, especially for a luxury SUV like the RX 350. And when in doubt, stick with reputable brands known for quality and reliability.

So, next time you need new tires, you'll be armed with the knowledge to make a smart choice. Keep those tires properly inflated, rotated regularly, and you'll enjoy many miles of happy, safe driving in your 2017 Lexus RX 350 AWD. Drive safe out there!