2018 Lexus RC300 Tires

The 2018 Lexus RC300 uses 235/45R18, 235/40R19, and 265/35R19 depending on the exact configuration. The 235/45R18 size appears on certain AWD and RWD versions, while 235/40R19 is used on several 19-inch applications. The 265/35R19 size is the rear tire for staggered RWD and F Sport RWD setups.

The most important step is confirming how the car is equipped before selecting a tire. An 18-inch square setup and a 19-inch staggered setup are not the same thing, even though both belong to the same model year. Check the drivetrain, trim, and actual wheel size on the car so the front and rear fitment stays correct.

A 2018 Lexus RC300 can use either 18-inch or 19-inch rims, depending on sub-model and tire size. The 235/45R18 tire belongs on an 18-inch rim, while 235/40R19 and 265/35R19 are both 19-inch sizes. Rim diameter is built into the tire size, so the last number in each size is the wheel diameter.

That makes wheel confirmation essential before ordering tires. Two RC300s can look similar but have different wheel packages, and a staggered 19-inch setup adds another layer because the rear tire is wider than the front. Checking the wheel stamping or the tire sidewall already on the car is the safest way to confirm the correct rim size.

The 2018 Lexus RC300 has more than one tire size because fitment changes with drivetrain, trim, and wheel package. Some versions use a square setup with the same tire size at all four corners, while certain RWD and F Sport RWD applications use a staggered arrangement with 235/40R19 in front and 265/35R19 in the rear.

That means the right choice depends on the exact configuration rather than the model name alone. A buyer should confirm whether the car is AWD or RWD, whether it is an F Sport, and whether the vehicle still has its intended wheel setup. Any previous wheel change can alter what size should be considered today.

Start with the correct size for the exact RC300 configuration, then compare the available radial options within that size. On this vehicle, that means confirming whether the car uses 235/45R18, 235/40R19, or the staggered 235/40R19 front and 265/35R19 rear combination. After size, the meaningful differences are tire series, brand, sidewall style, and rim-width compatibility.

A square setup usually makes rotation and matching straightforward, while a staggered setup requires careful front-to-rear pairing. Tire weight and load capacity can also be useful comparison points when those specifications are available. The best choice depends on whether the goal is maintaining the existing wheel package, preserving the coupe's handling balance, or selecting among the current performance-oriented options.

BFGoodrich is available across all three RC300 sizes covered here, including g-Force Comp 2 AS, g-Force Sport Comp 2, and g-Force Phenom T/A series depending on size. Nitto also appears in 265/35R19 with the NT555 G2. That gives the wider rear 19-inch fitment an additional brand choice beyond the BFGoodrich offerings.

Brand alone should not be the only deciding factor. It still makes sense to compare the exact tire series, the correct size for the car's wheel package, and any rim-width guidance attached to the tire. On a staggered RC300, keeping the front and rear fitments coordinated matters just as much as choosing between available brand names.

Available series for the 2018 Lexus RC300 include BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, BFGoodrich g-Force Phenom T/A, and Nitto NT555 G2. Not every series is offered in every size, so the exact selection depends on whether the car uses 235/45R18, 235/40R19, or 265/35R19.

Series comparison matters because it helps narrow choices within the correct fitment instead of treating all tires in a size as interchangeable. Once the right size is confirmed, look at which series are actually offered for that application, then compare sidewall style, rim-width suitability, and other specifications that affect how the tire matches the car's current wheel setup.

A period-style choice for a 2018 Lexus RC300 starts with keeping the correct factory-era sizing approach for the exact configuration, whether that is 235/45R18 or a 19-inch setup using 235/40R19 and possibly 265/35R19 at the rear. Since the available options here are modern radial Blackwall tires, the emphasis is more on maintaining the proper stance and wheel package than recreating a vintage sidewall treatment.

That approach suits a modern luxury sport coupe, where overall presentation depends heavily on correct proportions. Choosing the right tire size preserves the relationship between wheel diameter, sidewall profile, and body lines. For owners pursuing strict originality, the next step is comparing the car to factory literature, original window-sticker details, or marque-specific references tied to the exact trim and wheel option.

Correct tire fitment matters on a 2018 Lexus RC300 because the wrong diameter or the wrong front-to-rear pairing can change the car's visual balance and move it away from its intended configuration. This is especially important on staggered 19-inch RWD and F Sport RWD cars, where the front 235/40R19 and rear 265/35R19 work as a matched set.

Appearance is only part of the picture. Correct fitment also supports proper wheel compatibility and helps avoid clearance issues that can arise when a car has been modified or fitted with different wheels over time. Even on a newer collector-minded coupe, sticking with the right size pattern keeps the finished result more faithful to how the car was originally equipped.

Yes, modifications can affect tire fitment on a 2018 Lexus RC300 even when the tire size itself looks close to stock. Aftermarket wheels, changes in wheel width or offset, suspension lowering, and body alterations can all influence clearance. That matters most on 19-inch staggered setups, where the wider 265/35R19 rear tire already has a different role than the front size.

A modified RC300 should be checked for wheel diameter, wheel width, and front-to-rear consistency before replacing tires. Steering clearance, fender clearance, and suspension travel are also worth reviewing, especially if the car sits lower than standard. Matching the tire to the vehicle's current setup is more important than assuming every RC300 still wears its original wheel package.

Before driving a 2018 Lexus RC300 on new tires, inspect the wheel size, confirm that the front and rear tire sizes are installed in the correct positions, and check inflation pressure. It is also smart to look over the wheels for damage and make sure the tires have proper clearance at full steering lock and through normal suspension movement.

A short first drive should be used to confirm that the car feels settled and free from rubbing or vibration. Rechecking pressure after initial use is helpful, especially on a vehicle with staggered sizing where front and rear tires are not interchangeable. If the coupe has been sitting or recently modified, alignment and suspension condition deserve attention as well.

Tires on a 2018 Lexus RC300 should be inspected regularly, not just when tread looks worn. A routine visual check for uneven wear, sidewall cuts, punctures, cracking, and air loss helps catch problems early. On a staggered setup, inspecting both front and rear tires matters because the two sizes can wear differently and cannot simply be rotated corner to corner.

Monthly pressure checks are a practical habit, and an extra inspection before longer drives is worthwhile. Cars that see limited seasonal use can still age their tires even when mileage stays low, so tread depth alone is not the full story. Paying attention to wear pattern changes can also reveal alignment or suspension issues before they become more expensive problems.