The 2019 Acura RLX sits at the refined end of Acura’s sedan lineup, blending full-size comfort with a more understated performance character than many luxury rivals. It appeals to buyers who want modern road manners without giving up the sharp, technical feel long associated with the brand. For this exact model, tire fitment is straightforward: 245/40R19 radial tires on 19-inch wheels. That simplicity shifts the decision away from multiple fitment sizes and toward choosing the right radial within the size, including series and blackwall performance options from BFGoodrich. The real priorities are matching the wheel setup, intended driving use, and the sedan’s desired balance of comfort and response.
Which Tire Size Is Right for The 2019 Acura RLX
The 2019 Acura RLX uses one primary tire size: 245/40R19, and it is a radial fitment on a 19-inch rim. Both the Base and Sport Hybrid SH-AWD use this same size, so the main decision is not which size fits, but which 245/40R19 radial best matches the car’s wheel width, driving priorities, and product preferences.
A 245/40R19 tire uses a 245-millimeter section width, a 40-series aspect ratio, radial construction, and a 19-inch rim diameter. On the 2019 Acura RLX, this is a modern low-profile radial size that supports the sedan’s contemporary handling and road feel. Available choices in this size include BFGoodrich blackwall tires from the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A series. This size is the right starting point when the car remains on its original 19-inch wheel format and the goal is selecting the right performance-oriented radial within the proper fitment.
Tire fitment stays consistent across the covered 2019 Acura RLX sub-models. That makes the size question simple, but it still helps to confirm the exact vehicle and wheel setup before comparing tire series and specifications.
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2019 Acura RLX Base
The 2019 Acura RLX Base uses the shared 245/40R19 radial fitment. Tire selection therefore comes down to choosing the right 19-inch radial option for the car’s intended use, wheel-width compatibility, and preferred tire character.
The 2019 Acura RLX Sport Hybrid SH-AWD also uses 245/40R19 radial tires. That keeps fitment straightforward, while still leaving room to compare available blackwall radial options by series, load specification, and wheel-width range.
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 2019 Acura RLX Tires for Sale
Available 245/40R19 choices for the 2019 Acura RLX come from BFGoodrich and focus on blackwall radial performance tires. The product grid is most useful for comparing g-Force series differences, load specifications where stated, and wheel-width compatibility within the same core fitment.
These 2019 Acura RLX tire FAQs focus on the 245/40R19 fitment, 19-inch wheel compatibility, available BFGoodrich radial choices, and the practical checks that matter before regular road use or after wheel and suspension changes.
Tire Size & Fitment
What tire size fits a 2019 Acura RLX?
The 2019 Acura RLX uses 245/40R19 tires. This is a radial tire size built for a 19-inch wheel, and it applies to both the RLX Base and the RLX Sport Hybrid SH-AWD.
That means the first fitment check is usually the wheel currently on the car, not the sub-model badge. If the sedan still has its correct 19-inch wheel format, the next step is comparing available 245/40R19 tires by wheel-width range, load specification where stated, and the type of road use the car will actually see.
What size rim does a 2019 Acura RLX use?
The 2019 Acura RLX uses a 19-inch rim diameter with its 245/40R19 tire size. The available tires in this fitment are matched to that same 19-inch wheel diameter.
Rim diameter should be confirmed before choosing a tire, especially on a later-model sedan that may have seen wheel changes over time. Wheel width matters too, since the available 245/40R19 products are intended for rims in the 8.0 to 9.5-inch range, so both diameter and width should match the tire being considered.
Do all 2019 Acura RLX sub-models use the same tire size?
Yes. Both the 2019 Acura RLX Base and the 2019 Acura RLX Sport Hybrid SH-AWD use the same 245/40R19 radial tire size. There is no split in primary tire size between those covered sub-models.
That shared fitment makes selection simpler because the decision moves away from sub-model sizing differences and toward the tire itself. Even so, it is still worth checking the car’s actual wheel setup if it has aftermarket wheels, replacement rims, or prior suspension changes, since those factors can affect how well a 245/40R19 works in practice.
Choosing the Right Tire
What should I consider when choosing a 245/40R19 tire for a 2019 Acura RLX?
Start with the basics: the tire should be the correct 245/40R19 size, radial construction, and appropriate for a 19-inch wheel. From there, compare the available options by wheel-width range, load specification where stated, and the type of driving the RLX will handle most often.
A sedan used for regular highway driving may lead you toward a different choice than one driven more aggressively or in varied weather. Since the available options stay within the same size, the real comparison is between tire series and operating characteristics, while making sure the tire matches the car’s actual wheel width and overall setup.
What sidewall styles are available for 2019 Acura RLX tires?
The available 245/40R19 tires for the 2019 Acura RLX use a blackwall sidewall style. That keeps the appearance clean and contemporary, which suits the RLX’s modern luxury-sport sedan character.
Since there is no sidewall-style split within the current fitment choices, appearance differences come more from the tire series than from whitewall or specialty sidewall treatments. Buyers who want to preserve the car’s understated factory-era look will usually focus on choosing the right performance category, wheel compatibility, and overall road-use behavior rather than sidewall ornamentation.
What tire series are available for the 2019 Acura RLX?
The 2019 Acura RLX is available in 245/40R19 through several BFGoodrich series, including g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A. All are blackwall radial options built around the same core size and 19-inch wheel diameter.
Those series names matter because they help separate the choices within a single fitment rather than forcing a size change. A buyer comparing them should look at how each tire aligns with intended use, whether load details are stated, and whether the wheel falls within the published rim-width range before deciding which version of 245/40R19 makes the most sense.
Restoration & Appearance
Which tire should I choose for a period-style 2019 Acura RLX?
A period-style 2019 Acura RLX tire choice starts with the original fitment format: 245/40R19 radial on a 19-inch wheel. Since the available options stay within that modern size and use blackwall sidewalls, the closest period-style presentation comes from keeping the correct dimensions and contemporary overall appearance.
This is less about vintage sidewall styling and more about avoiding a tire that changes the car’s visual stance or wheel relationship. Keeping the proper size preserves the RLX’s intended modern proportions, while the final choice can be guided by tire series, wheel-width compatibility, and whether the car is meant for regular driving, occasional use, or a highly original presentation.
Does correct tire fitment matter for a 2019 Acura RLX restoration?
Yes, correct tire fitment still matters on a 2019 Acura RLX restoration or preservation project. Even though this is a modern sedan rather than a vintage collector car, the proper 245/40R19 size helps maintain the intended relationship between the tire, the 19-inch wheel, and the car’s overall stance.
Using the right size also keeps the visual presentation closer to the RLX’s original era and reduces the chance of unwanted clearance or appearance issues from an incorrect profile. If exact originality is especially important, tire selection should be checked alongside wheel specifications and any vehicle history showing whether the sedan still retains its original-style wheel setup.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Acura RLX?
Yes. A 2019 Acura RLX may still use the correct 245/40R19 tire size on paper, but aftermarket wheels, altered wheel offset, suspension changes, or body modifications can change how that tire fits on the car. The original fitment assumes a compatible 19-inch wheel and proper clearances.
A lowered ride height or wider replacement wheel can create rubbing issues even when the size itself appears correct. It is smart to confirm wheel width, wheel position, and clearance at full steering lock and suspension travel before settling on a tire, especially if the RLX no longer has its original wheel-and-suspension configuration.
What should I inspect before driving a 2019 Acura RLX on new tires?
Before driving a 2019 Acura RLX on new tires, inspect the wheel condition, verify the tire size is 245/40R19, and make sure the tires are seated properly and inflated evenly. It also helps to check for any signs of interference at the inner fender, suspension, or steering components.
A short initial drive should be followed by another inspection for air loss, unusual vibration, or fresh rub marks. Later-model sedans can hide fitment issues until the steering is at full lock or the suspension is loaded, so a careful post-installation check is worthwhile even when the tire size and wheel diameter appear to be correct.
How often should tires on a 2019 Acura RLX be inspected?
Tires on a 2019 Acura RLX should be inspected regularly, not just when tread looks low. Routine checks should include air pressure, visible tread wear, cuts, bulges, cracking, and any sign of uneven wear that could point to alignment, wheel, or suspension concerns.
Cars driven less often still need attention because age and storage conditions can affect the tire even when mileage stays low. A quick visual inspection before longer drives and periodic checks during normal ownership help catch developing problems early, which is especially important on a low-profile 245/40R19 tire where condition changes can become noticeable quickly.
