The 2017 Lexus RC300 sits in the modern luxury sport coupe market, blending Lexus refinement with a sharper, more athletic character than the brand’s traditional sedans. Its styling and chassis balance make tire choice especially important, because the right fitment affects both stance and everyday road manners. This RC300 uses radial tires in two primary sizes, 235/40R19 and 235/45R18, depending on configuration. Available choices stay within a contemporary performance-oriented theme, with Blackwall BFGoodrich options across several g-Force series. The key is confirming which wheel diameter your RC300 has first, then choosing a tire that matches your driving priorities, wheel setup, and overall presentation.
Which Tire Size Is Right for The 2017 Lexus RC300
The 2017 Lexus RC300 uses two primary tire sizes, and the first step is confirming whether the car is on 18-inch or 19-inch wheels. Size selection also depends on sub-model, since the F Sport uses 235/40R19 while the Base can use either 235/40R19 or 235/45R18. Once wheel diameter is confirmed, the decision shifts to choosing among available radial options within the correct size.
235/40R19 is a metric radial size in which 235 identifies the nominal section width in millimeters, 40 is the aspect ratio, R designates radial construction, and 19 is the wheel diameter in inches. On the 2017 Lexus RC300, this size supports the coupe’s modern sport-oriented fitment and is used on 19-inch wheels. The available product choice in this size is a BFGoodrich g-Force Phenom T/A Blackwall tire. This size is the one to evaluate when your RC300 is equipped with 19-inch wheels and you want to keep the intended low-profile tire format.
235/45R18 is a metric radial size with a 235-millimeter nominal section width, a 45-series profile, radial construction, and an 18-inch rim diameter. For the 2017 Lexus RC300, it serves the 18-inch wheel fitment and keeps a very similar overall tire height to the 19-inch option while using a different wheel diameter. BFGoodrich offers this size in several Blackwall g-Force series, including g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A. This is the size to consider when your RC300 Base is running 18-inch wheels and you want to compare several product personalities within the correct fitment.
Sub-model fitment matters on the 2017 Lexus RC300 because tire size is not the same across every version. The Base can use either 18-inch or 19-inch fitment, while the F Sport uses the 19-inch setup, so confirming the exact sub-model and wheel package comes first.
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2017 Lexus RC300 Base
The 2017 Lexus RC300 Base can use either the 235/40R19 radial size or the 235/45R18 radial size, depending on the wheel setup on the car. That makes wheel-diameter confirmation especially important before comparing tires, since available choices and rim-width requirements differ between the two fitments.
The 2017 Lexus RC300 F Sport uses the 235/40R19 radial fitment. Tire selection here is more straightforward than on the Base model, but it still pays to confirm the actual wheel setup and compare the tire’s rim-width specification with the wheels currently on the car.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2017 Lexus RC300 Tires for Sale
Available 2017 Lexus RC300 tire choices center on BFGoodrich Blackwall radials. The 18-inch fitment offers several g-Force series to compare, while the 19-inch fitment uses the g-Force Phenom T/A, making wheel diameter the main filter before looking at rim-width range, load specification, and series character.
Owners researching 2017 Lexus RC300 tires usually need to confirm the correct size first, especially when 18-inch and 19-inch wheel fitments are both possible. The questions below focus on size, sub-model differences, product selection, wheel compatibility, and practical checks before road use.
Tire Size & Fitment
What tire size fits a 2017 Lexus RC300?
The 2017 Lexus RC300 uses two primary tire sizes: 235/40R19 and 235/45R18. Both are radial metric sizes, and the correct one depends on the car’s sub-model and wheel setup. The F Sport uses 235/40R19, while the Base can use either 235/40R19 or 235/45R18.
The practical first step is to confirm the wheel diameter actually on the car, because an 18-inch tire cannot be mounted on a 19-inch wheel, and vice versa. If the car has been changed from its original wheel package, match the replacement tire to the current wheel diameter and width before comparing brands or tire series.
What size rim does a 2017 Lexus RC300 use?
A 2017 Lexus RC300 uses either an 18-inch or 19-inch rim, depending on configuration. The 235/45R18 tire fits an 18-inch wheel, while the 235/40R19 tire fits a 19-inch wheel. Those two fitments have very similar overall tire height, but they are not interchangeable because the wheel diameters are different.
Wheel diameter is the non-negotiable fitment point, but wheel width also matters when choosing among available tires. Before final selection, check the size stamped on the wheel or verify the wheel dimensions on the car so the tire’s approved rim-width range matches the actual setup.
Do all 2017 Lexus RC300 sub-models use the same tire size?
No, 2017 Lexus RC300 sub-models do not all use the same tire size. The F Sport uses 235/40R19, while the Base can use either 235/40R19 or 235/45R18. That means the exact trim and wheel package affect which tire belongs on the car.
This matters because the two sizes mount to different wheel diameters and come with different product choices. A Base model owner should not assume the tire size matches an F Sport simply because both are RC300 coupes. Confirm the sub-model, then verify the wheels currently installed before selecting a replacement tire.
Choosing the Right Tire
What should I consider when choosing a tire for a 2017 Lexus RC300?
Start with the correct size for the car: 235/40R19 or 235/45R18, depending on the sub-model and wheel diameter. From there, compare tire series, radial construction details, rim-width range, load specification where stated, and the kind of driving the RC300 sees most often.
A car used mainly for everyday street driving may lead you toward one series, while a more performance-minded setup may lead you toward another. The best comparison is not just brand or name alone, but how each tire matches the wheel dimensions on the car and the way you expect the coupe to be used.
What sidewall styles are available for 2017 Lexus RC300 tires?
The available 2017 Lexus RC300 tires in these fitments use a Blackwall sidewall style. That applies to the BFGoodrich options offered in both 235/40R19 and 235/45R18. The overall look stays modern and understated, which suits the RC300’s contemporary coupe design.
Since the visible sidewall treatment does not vary here, the real product differences are in tire series, rim-width compatibility, and other specification details. Once the correct size is confirmed, the choice becomes less about appearance variation and more about selecting the tire that best matches the car’s wheel setup and intended use.
What tire series are available for the 2017 Lexus RC300?
Available tire series for the 2017 Lexus RC300 include BFGoodrich g-Force Phenom T/A, g-Force Comp 2 AS, and g-Force Sport Comp 2. The 19-inch 235/40R19 fitment is offered in g-Force Phenom T/A, while the 18-inch 235/45R18 fitment has the broadest series variety.
That means the 18-inch fitment gives a buyer more to compare within the same size, while the 19-inch fitment is more focused. If your RC300 Base can use either wheel package, the tire series available may influence whether you stay with the current wheels or evaluate a different wheel-and-tire setup already on the car.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Lexus RC300?
A 2017 Lexus RC300 is modern enough that the goal is usually preserving its original visual character rather than creating a vintage restoration look. Staying with the correct 235/40R19 or 235/45R18 radial fitment and a clean Blackwall sidewall keeps the appearance in line with the coupe’s factory-era design language.
The more important appearance choice is whether the car is on 18-inch or 19-inch wheels, since that changes the tire profile and overall visual stance. Owners focused on originality should verify the wheel package already on the car before replacing tires so the finished look stays consistent with the RC300’s intended presentation.
Does correct tire fitment matter for a 2017 Lexus RC300 restoration or preservation project?
Yes, correct tire fitment matters because the 2017 Lexus RC300’s appearance depends heavily on wheel diameter and sidewall proportion. Even though this is not a vintage restoration case, using the proper 235/40R19 or 235/45R18 size helps preserve the coupe’s intended stance, wheel-to-tire balance, and overall visual character.
Preservation-minded owners should also pay attention to whether the car remains in Base or F Sport-style configuration. A mismatched tire size can alter the look even when the tire physically mounts to the wheel. Checking the current wheel package first keeps appearance decisions grounded in the actual setup on the vehicle.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Lexus RC300?
Yes, modifications can affect tire fitment on a 2017 Lexus RC300. Aftermarket wheels, altered wheel widths, offset changes, suspension lowering, or body changes can all influence which 235-section tire works properly. Even when the nominal tire size stays the same, the available space around the wheel and suspension can change.
That is why a modified RC300 should be checked as it sits, not just by model year and trim. Confirm wheel diameter first, then compare wheel width with the tire’s approved range and inspect clearance at full steering lock and suspension movement before settling on a replacement tire.
What should I inspect before driving a 2017 Lexus RC300 on new tires?
Before driving a 2017 Lexus RC300 on new tires, inspect the wheel diameter and width, verify the tires are mounted in the correct size, and confirm proper inflation. It also helps to look over the wheels for damage and make sure valve stems, balancing, and general installation quality are in good order.
A short road check is worthwhile after installation to confirm there is no rubbing, vibration, or unusual steering behavior. On a car with 18-inch and 19-inch fitments both possible, taking a moment to verify the exact wheel-and-tire combination can prevent avoidable problems and make sure the car feels settled on the road.
How often should tires on a 2017 Lexus RC300 be inspected?
Tires on a 2017 Lexus RC300 should be inspected regularly, especially for tread wear, cuts, punctures, bulges, sidewall damage, and air loss. A quick visual check before routine driving is sensible, and a closer inspection is worthwhile whenever the car has been parked for extended periods or has encountered rough road conditions.
Modern performance-oriented fitments can be sensitive to pressure and alignment, so even small issues are worth catching early. Regular inspection also helps confirm that wear is even across the tread, which can reveal wheel, suspension, or inflation problems before they affect ride quality, handling, or tire life.
