The 2014 Acura RLX arrived as Acura’s flagship sedan, blending premium comfort with a more modern, technology-focused character than many traditional full-size luxury cars. That means tire selection on this exact model is less about vintage-style interpretation and more about matching the right wheel and sub-model setup. The 2014 Acura RLX uses radial tire fitments in 245/45R18 and 245/40R19, with fitment varying by configuration. Available choices include blackwall performance-oriented radial tires from BFGoodrich and Nitto across several series. The key first step is confirming whether the car has 18-inch or 19-inch wheels before comparing tire series, load specs, and overall driving priorities.
Which Tire Size Is Right for The 2014 Acura RLX
Two primary tire sizes apply to the 2014 Acura RLX, and the right one depends on the exact sub-model and wheel diameter. Both are radial fitments, but one uses an 18-inch rim and the other uses a 19-inch rim. Before choosing a tire, confirm whether the car is a Base model on 18-inch wheels, a Base model on 19-inch wheels, or a Sport Hybrid SH-AWD, which uses the 19-inch size.
A 245/40R19 tire is a metric radial size with a 245-millimeter section width, a 40-series aspect ratio, radial construction, and fitment for a 19-inch rim. On the 2014 Acura RLX, this size is used on 19-inch wheel applications, including the Sport Hybrid SH-AWD. Available choices are blackwall radials from BFGoodrich in the g-Force Sport Comp 2, g-Force Comp 2 AS, and g-Force Phenom T/A series. This size is the one to evaluate when the car is already set up with 19-inch wheels and the goal is to match that wheel diameter with an appropriate modern radial tire.
A 245/45R18 tire uses the same 245-millimeter width but pairs it with a 45-series aspect ratio and a 18-inch rim diameter in radial construction. On the 2014 Acura RLX, this size applies to certain Base model configurations using 18-inch wheels. Product choices include blackwall radials from BFGoodrich and Nitto, with several performance-oriented series available. This is the size to focus on when the car has 18-inch wheels, and it is worth comparing rim-width specifications and load figures before making a final selection.
Sub-model fitment matters on the 2014 Acura RLX because tire size is not the same across every configuration. The first step is identifying the exact sub-model and confirming whether the car is on 18-inch or 19-inch wheels before narrowing down tire choices.
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2014 Acura RLX Base
The 2014 Acura RLX Base can use either of the two primary radial tire sizes, depending on wheel setup. That makes wheel-diameter confirmation especially important before comparing available BFGoodrich or Nitto options, since the right tire starts with the car’s actual 18-inch or 19-inch rim.
The 2014 Acura RLX Sport Hybrid SH-AWD uses the 245/40R19 radial size on a 19-inch wheel. Tire selection here is more straightforward, so the main decision becomes comparing available blackwall radial series and checking rim-width compatibility against the wheel already 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 2014 Acura RLX Tires for Sale
Available 2014 Acura RLX tire choices center on 245/40R19 and 245/45R18 blackwall radials from BFGoodrich and Nitto. The product grid is where to compare tire series, rim-width compatibility, load specifications where stated, and whether the car is running the 18-inch or 19-inch fitment.
Common 2014 Acura RLX tire questions usually come down to identifying the correct size by sub-model and wheel diameter, then comparing radial tire choices by brand, series, and fitment details that matter for everyday road use.
Tire Size & Fitment
What tire size fits a 2014 Acura RLX?
The 2014 Acura RLX uses two primary tire sizes: 245/45R18 and 245/40R19. Both are radial sizes. The Base model can use either size depending on wheel setup, while the Sport Hybrid SH-AWD uses 245/40R19.
The important next step is confirming the car’s actual wheel diameter before choosing a tire. An 18-inch RLX needs the 245/45R18 size, while a 19-inch setup requires 245/40R19. Checking the existing wheel, the tire sidewall, and the exact sub-model will prevent ordering the right width and profile for the wrong rim diameter.
What size rim does a 2014 Acura RLX use?
A 2014 Acura RLX uses either an 18-inch or 19-inch rim, depending on configuration. The 245/45R18 tire fits an 18-inch wheel, and the 245/40R19 tire fits a 19-inch wheel. Both sizes are modern radial fitments.
That means rim diameter needs to be verified before any tire comparison begins. The Base model can appear with either wheel size, so it is not enough to identify the car only by year and model. Confirm the actual wheel on the car, then compare tire options that match that diameter and the wheel’s width range.
Why does the 2014 Acura RLX have more than one tire size?
More than one tire size appears on the 2014 Acura RLX because fitment changes with sub-model and wheel package. The Base model can use either 245/45R18 or 245/40R19, while the Sport Hybrid SH-AWD uses 245/40R19. Both sizes are correct only in the right wheel application.
That variation makes wheel confirmation more important than comparing tread patterns first. Even though the two sizes are close in overall diameter, they are built for different rim diameters and should be selected to match the wheel already installed. Any time the car has had wheel changes, use the actual wheel and tire markings as the final check.
Choosing the Right Tire
What should I consider when choosing a 2014 Acura RLX tire?
Start with the correct size for the car’s wheel and sub-model, since the 2014 Acura RLX uses either 245/45R18 or 245/40R19. From there, compare radial tire series, rim-width compatibility, load figures where stated, and whether the tire matches the way the car is driven.
A Base model owner may need to confirm wheel diameter first, while a Sport Hybrid SH-AWD owner can focus sooner on the 245/40R19 choices. It also helps to look at tire weight and sidewall style, although all current options here are blackwall radials. The best comparison is between correctly sized tires that suit the car’s actual wheel setup.
What brands offer tires for the 2014 Acura RLX?
Tires for the 2014 Acura RLX are available from BFGoodrich and Nitto, depending on size. BFGoodrich appears in both 245/40R19 and 245/45R18, while Nitto appears in the 245/45R18 fitment. All of the available products here are radial blackwall tires.
Brand choice should still come after confirming the correct size and rim diameter. Once that is settled, the comparison becomes more about the tire series offered within that size, along with rim-width range and load specification where shown. A buyer deciding between brands should treat size match and wheel compatibility as the first filter, not the logo on the sidewall.
What tire series are available for the 2014 Acura RLX?
The 2014 Acura RLX is offered with several radial tire series, including BFGoodrich g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, and the Nitto NT555 G2. Series availability depends on whether the car uses 245/40R19 or 245/45R18.
That makes the series decision a second step after confirming size. Once the correct size is known, comparing series can help narrow the field by intended use, load specification where listed, and rim-width compatibility. The useful approach is to compare tires within the same size rather than trying to choose a series before verifying whether the RLX is on 18-inch or 19-inch wheels.
Restoration & Appearance
Does correct tire fitment matter for a 2014 Acura RLX restoration?
Correct tire fitment still matters on a 2014 Acura RLX restoration, even though this is a modern luxury sedan rather than a traditional collector-era car. The right size preserves the intended relationship between the tire, wheel diameter, and overall stance, with 245/45R18 and 245/40R19 tied to specific RLX configurations.
Appearance is only part of that equation. Using the wrong rim diameter or profile can change how the car sits and may create avoidable fitment issues. For a restoration-oriented project, confirm the exact sub-model and wheel setup first, then choose a tire that matches that configuration and supports the finished look without guessing across sizes.
Which sidewall style suits a period-style 2014 Acura RLX?
Current tire choices for the 2014 Acura RLX are blackwall radials, which suit the car’s original-era modern luxury sedan appearance better than vintage-style sidewall treatments would. Since the RLX belongs to a contemporary design period, a clean blackwall presentation is the most natural visual match among the available options.
The appearance decision is straightforward here because the selection does not branch into whitewall, redline, or raised white letter choices. Instead, the visual difference comes from picking the correct 18-inch or 19-inch fitment so the car keeps the proper tire-to-wheel proportion. For this model, correct sizing does more for the finished appearance than decorative sidewall treatment.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2014 Acura RLX?
Modifications can affect tire fitment on a 2014 Acura RLX, especially if the car has aftermarket wheels, altered offsets, suspension changes, or non-stock ride height. The factory size range already splits between 245/45R18 and 245/40R19, so even a correct tire size can create issues if the wheel itself is different from the original setup.
A modified RLX should be checked for wheel diameter, wheel width, steering clearance, and fender clearance before settling on a tire. Tire selection should also account for the wheel’s acceptable rim-width range. Looking at the current wheel markings and measuring clearances at full lock is a smarter approach than assuming any stock-size tire will behave the same on a changed chassis.
What should I inspect before driving a 2014 Acura RLX on new tires?
Before driving a 2014 Acura RLX on new tires, inspect the wheel size, verify the tire size matches the car’s setup, and check that inflation is set correctly for the application. It is also worth looking over the wheels for damage and making sure the tires seat evenly and show no visible issues after installation.
A short follow-up inspection helps catch anything that changes once the car is back on the road. Look for rubbing during turns, confirm stable air pressure, and watch for vibration that could point to balance or wheel-condition problems. Since the RLX can use either 18-inch or 19-inch fitments, confirming that the new tires match the actual wheel remains the most important first check.
What should I check before a longer drive in a 2014 Acura RLX?
Before a longer drive in a 2014 Acura RLX, check tire pressure, tread condition, and the sidewalls for cuts, cracking, or bulges. Make sure the car is riding on the correct tire size for its wheel setup, since the RLX uses either 245/45R18 or 245/40R19 depending on configuration.
Longer trips also make it worthwhile to inspect for slow air loss and confirm that each tire is wearing evenly. Uneven wear can point to alignment or suspension issues that may become more noticeable at highway speed. On a car that sees less frequent use, tire age and storage history matter too, even if the tread still looks serviceable at a glance.
