Looking to upgrade your Lexus RX 350 tires but not sure what size fits? Don’t worry—you’re in the right place to find the correct tire size.
Several factors come into play when choosing tires for any vehicle, including rim size, speed rating, load index, and features that ensure safe braking performance.
Let’s take a closer look at what tire size is right for your Lexus RX 350.
What Size Tire for Lexus RX 350?
Wheel Rim Size
The rim size is crucial for confirming the right tire fit, as the tire must match the dimensions of the wheel. Knowing your rim size makes it easier to install new tires. Keep in mind that the RX 350’s rim size can vary depending on the model year and trim level.
Based on our data, recent models typically feature a 20 x 8-inch wheel size. To find the exact dimensions for your specific model, check your vehicle’s specifications. Once you know the rim size, you can select a tire that matches.
For example, a 20-inch tire diameter would be suitable for a 20-inch rim. Since tire width is measured in millimeters (as indicated by the tire’s numerical code), you’ll want to select a tire with a width that fits an 8-inch wide rim.
For a 20-inch rim, a tire with a width of 225–235 mm will fit. So for your Lexus RX 350, a tire size of 235/55R20 would be appropriate.
In this tire code:
- 235 refers to the tire width in millimeters.
- 55 refers to the aspect ratio (the tire’s sidewall height as a percentage of the tire’s width).
- R20 indicates the tire’s diameter is 20 inches.
For example, P235/55R20 102W is a perfect fit for a 2020 RX 350, provided you match the year and model.
For Earlier Models
If you have an earlier RX 350, you may need a different tire size. For example, earlier models typically use 235/65R18 or P235/55R19 tires, as these rims are smaller than those on the latest models. The numbers in the tire size code (18 or 19) indicate the rim diameter in inches.
Load Capacity
Choosing the right tire size for your Lexus RX 350 isn’t just about rim size. The load capacity of the tire is also important for safe driving. New tires must have the capacity to support the weight of the car, especially at high speeds.
The load index is listed in the tire code. For example, in the tire size P235/55R20 102W, the 102 is the load index. This means the tire can support up to 1,874 lbs (850 kg) per tire. Since the RX 350 has an approximate curb weight of 4,100 lbs, each tire will carry around 1,025 lbs, which is well within the tire’s load capacity.
Be sure to check the load index of the tire to ensure it matches or exceeds the weight requirements of your vehicle.
Speed Rating
If you’ve noticed, there’s a letter W at the end of the tire size (e.g., P235/55R20 102W). This letter indicates the tire’s speed rating, which represents the maximum speed the tire can safely handle.
In this case, W indicates that the tire is rated for speeds up to 168 mph. However, the Lexus RX 350 has a top speed of around 124.3 mph, so the tire’s speed rating far exceeds the vehicle’s maximum speed, which is perfectly safe.
Always choose a tire with a speed rating equal to or higher than your vehicle’s top speed.
Tread Structure
The tread design plays a vital role in a tire’s performance, especially in handling, braking, and during adverse weather conditions. When upgrading your tires, be sure to select a model with a unique and deep tread pattern for better grip on wet surfaces and in high-speed situations. A tire with a well-designed tread will provide more control and stability.
Conclusion
In summary, the ideal tire size for the 2020 Lexus RX 350 and newer models is P235/55R20 102W. For earlier models, check your vehicle’s manual or contact us for more details on the best tire size for your specific model.
We hope this article helps you find the right tires for your Lexus RX 350. If you need further assistance, feel free to reach out, and we’ll help you select the perfect tire for your vehicle.
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