The 2018 Lexus LC500 arrived as a grand touring coupe with dramatic styling, a low stance, and a wheel-and-tire package that plays a major role in both its appearance and its road manners. Tire fitment on this model centers on a staggered radial setup, with different front and rear sizes and either 20-inch or 21-inch rim diameters depending on the wheel package. That makes the first decision less about brand loyalty and more about confirming the exact wheel diameter and axle position before comparing available tire series and sidewall treatments. Owners balancing original visual character, replacement practicality, and modified-wheel concerns should verify the car’s current setup carefully.
Which Tire Size Is Right for The 2018 Lexus LC500
The 2018 Lexus LC500 uses four primary tire sizes because it has a staggered front-and-rear setup and was fitted with either 20-inch or 21-inch wheels. The first step is identifying both the axle position and the wheel diameter on the car, since the front uses 245-width tires and the rear uses 275-width tires. Once that is confirmed, the real comparison becomes product style, tire series, sidewall presentation, and wheel-width compatibility within the correct size.
In 245/40R21, the 245 is the tire’s nominal section width in millimeters, 40 is the aspect ratio, R identifies radial construction, and 21 is the rim diameter in inches. This size serves as a low-profile modern radial fitment for the front of certain 2018 Lexus LC500 configurations using 21-inch wheels. Its dimensions reflect the LC500’s contemporary staggered layout, where front and rear tire widths differ for both stance and balance. Choosing this size starts with confirming that the car actually carries the 21-inch front wheel package rather than the 20-inch setup.
The 245/45R20 size uses a 245-millimeter nominal section width, a 45-series profile, radial construction, and a 20-inch rim diameter. On the 2018 Lexus LC500, this is the front tire size for cars equipped with the 20-inch wheel package. Available choices in this size include BFGoodrich, Nitto, and Pro-Trac options, with blackwall, redline, and RWL sidewall treatments across several tire series. This is the size to evaluate when replacing front tires on a 20-inch LC500 while also considering the car’s visual style and the wheel’s width range.
A 275/35R21 tire has a nominal section width of 275 millimeters, a 35-series profile, radial construction, and a 21-inch rim diameter. This size belongs on the rear of 2018 Lexus LC500 models fitted with the 21-inch staggered wheel package, pairing a wider rear tire with a lower profile than the 20-inch alternative. Its role is specific to the rear axle, so it should not be treated as a universal LC500 size simply because it shares the same model year and nameplate. The key check here is confirming the car’s existing rear wheel diameter before selecting a replacement.
The 275/40R20 code means a 275-millimeter nominal section width, a 40-series profile, radial construction, and a 20-inch rim diameter. On the 2018 Lexus LC500, this size is used on the rear when the car has the 20-inch wheel package, completing the staggered setup with a wider rear tire than the front. Product choice is broad in this size, with BFGoodrich, Nitto, M&H Racemaster, and Pro-Trac offerings in blackwall, redline, and RWL styles across several tire series. This rear size should be matched to the 20-inch setup, with wheel width and intended use compared carefully.
Sub-model fitment on the 2018 Lexus LC500 is straightforward in name but important in application, because the front and rear positions use different tire sizes and may be paired with either 20-inch or 21-inch wheels. Checking whether the tire is for the front or rear of the car matters just as much as confirming the wheel diameter.
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2018 Lexus LC500 Base Front
The 2018 Lexus LC500 Base Front uses a 245-width radial tire, with fitment split between 20-inch and 21-inch wheel packages. Tire selection at the front starts with verifying which wheel diameter is on the car, then comparing available tire series and sidewall styles in the matching size.
The 2018 Lexus LC500 Base Rear uses a wider 275-width radial tire, again divided between 20-inch and 21-inch wheel packages. Rear replacement depends on confirming the existing rim diameter first, then choosing among the available product types that suit the car’s current appearance goals and driving use.
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 2018 Lexus LC500 Tires for Sale
Available 20-inch LC500 tire choices span BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster, with several radial tire series and sidewall treatments including blackwall, redline, and RWL. That gives 245/45R20 front and 275/40R20 rear owners meaningful options in both appearance and wheel-width compatibility.
These 2018 Lexus LC500 tire FAQs focus on staggered sizing, 20-inch versus 21-inch wheel fitment, available radial choices, sidewall options, and the checks that matter before replacing tires on a grand touring coupe with a low, wide stance.
Tire Size & Fitment
What tire size fits a 2018 Lexus LC500?
The 2018 Lexus LC500 uses a staggered radial tire setup rather than one universal size. Front fitment is either 245/45R20 or 245/40R21, while rear fitment is either 275/40R20 or 275/35R21, depending on the wheel package on the car.
That means the right replacement starts with identifying both the axle position and the wheel diameter already installed. A front tire and rear tire are not interchangeable on this application, and a 20-inch setup should not be confused with the 21-inch package simply because the overall tire dimensions are close.
What size rim does a 2018 Lexus LC500 use?
A 2018 Lexus LC500 uses either 20-inch or 21-inch rims, depending on the wheel package. The 245/45R20 and 275/40R20 tires are for 20-inch wheels, while the 245/40R21 and 275/35R21 tires are for 21-inch wheels.
Wheel diameter is the first thing to confirm before ordering replacement tires. The LC500 also uses a staggered layout, so the front and rear wheel-and-tire sizes differ even when the car stays within one diameter package, making it important to verify the full setup at each corner rather than relying on model name alone.
Why does the 2018 Lexus LC500 have more than one tire size?
The 2018 Lexus LC500 has more than one tire size because it uses a staggered arrangement with narrower front tires and wider rear tires, and it was fitted with either a 20-inch or 21-inch wheel package. That creates four primary fitment sizes across the vehicle’s front and rear positions.
In practical terms, the question is not which single size fits the whole car, but which axle and wheel diameter you are replacing. Looking at the sidewall of the current tire or confirming the wheel diameter directly is the safest way to avoid mixing front and rear sizes or crossing 20-inch and 21-inch fitments.
Choosing the Right Tire
What should I consider when choosing a 2018 Lexus LC500 tire?
Start with the correct position and wheel diameter, because the 2018 Lexus LC500 uses different front and rear sizes and came with either 20-inch or 21-inch rims. After size is confirmed, compare radial construction details such as rim-width compatibility, load capacity where stated, tire series, and sidewall treatment.
The best choice depends on how the car is used and how you want it to present visually. A blackwall tire keeps a contemporary look, while redline or RWL options change the car’s character noticeably, so appearance, wheel setup, and the intended mix of touring, street, or specialty use should all guide the final decision.
What sidewall styles are available for 2018 Lexus LC500 tires?
Available 20-inch tire options for the 2018 Lexus LC500 include blackwall, redline, and RWL sidewall styles. Blackwall appears across several BFGoodrich, Nitto, and M&H Racemaster products, while Pro-Trac Street Pro III options add redline and raised white letter choices in both the front and rear 20-inch sizes.
That sidewall choice affects appearance more than fitment, but it can make a noticeable difference on a car with the LC500’s sculpted bodywork and large wheel openings. Once the correct size is confirmed, sidewall style becomes a useful way to steer the car toward a cleaner modern presentation or a more assertive custom look.
What brands offer tires for the 2018 Lexus LC500?
For the 20-inch 2018 Lexus LC500 sizes, available brands include BFGoodrich, Nitto, Pro-Trac, and M&H Racemaster. Those options cover the 245/45R20 front size and the 275/40R20 rear size, with several radial tire series and a mix of appearance-focused and specialty-oriented selections.
Brand alone should not be the only filter on this car. It makes more sense to compare each product within the correct front or rear size, then look at sidewall style, rim-width specification, load details where given, and how the tire’s overall character matches the LC500’s current wheel package and intended use.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2018 Lexus LC500?
Yes, modifications can affect tire fitment on a 2018 Lexus LC500. Aftermarket wheels, altered offsets, suspension changes, lowering, or body modifications can all change the space available for the tire, even when the replacement still matches one of the original LC500 size codes.
That matters on a low, wide coupe with a staggered setup, because small changes in wheel position can affect fender, liner, or steering clearance. Any LC500 that no longer has its original wheel-and-suspension configuration should have the wheel diameter, wheel width, and physical clearance checked before a replacement tire is selected.
What should I inspect before driving a 2018 Lexus LC500 on new tires?
Before driving a 2018 Lexus LC500 on new tires, confirm that each tire is mounted in the correct front or rear position and on the proper 20-inch or 21-inch wheel. It also helps to inspect inflation pressure, bead seating, valve condition, and basic clearance around the fender liners and suspension components.
A short initial road check is worthwhile after installation, especially on a staggered car where the front and rear sizes differ. Watch for vibration, rubbing, unusual steering feel, or uneven appearance side to side, since those signs can point to a mounting, wheel, or clearance issue that should be addressed before regular driving.
What should I check before a longer drive in a 2018 Lexus LC500?
Before a longer drive in a 2018 Lexus LC500, inspect tread condition, sidewalls, and inflation pressure on all four tires, and verify that the front and rear sizes are correctly matched to the car’s wheel package. Any visible cracking, cuts, bulges, or recurring air loss deserves attention before extended road use.
Longer trips also put more importance on overall condition than simple tread depth. A car that sits for periods can have tires that look presentable at a glance but still need a careful age-and-condition review, so checking each tire individually is especially important on a grand touring coupe expected to cover distance comfortably.
