Acura Trucks RDX Tires

Acura Trucks RDX uses four tire sizes across the years covered here. The 2007-2012 models use 235/55R18 on 18-inch wheels, the 2013-2018 models use 235/60R18 on 18-inch wheels, and the 2019-2026 models use either 235/55R19 on 19-inch wheels or 255/45R20 on 20-inch wheels. Those late-model sizes are not interchangeable unless the vehicle also has the matching wheel diameter.

The practical takeaway is that Acura Trucks RDX fitment starts with the wheel, then the size. Read the sidewall on the tire already on the vehicle, check the wheel diameter directly, and compare it to the year listing before choosing a replacement. That matters most on 2019 and newer Acura Trucks RDX models, where two different wheel packages were used in the same model years.

On an Acura Trucks RDX, 235/55R18 is a metric radial tire size. The 235 is the tire's section width in millimeters, 55 is the aspect ratio or sidewall height as a percentage of width, R means radial construction, and 18 is the wheel diameter in inches. That size belongs to 2007-2012 Acura Trucks RDX applications in the year range covered here.

Understanding the code helps prevent the most common mistake, which is assuming that any tire with a similar width will work. The aspect ratio and rim diameter are just as important as the width because they determine overall height and wheel fit. On Acura Trucks RDX, even another 235-width tire may be wrong if the sidewall ratio or wheel diameter differs.

A 2019 Acura Trucks RDX has two tire sizes listed because that model year used two different wheel diameters. One setup uses 235/55R19 on a 19-inch wheel, while the other uses 255/45R20 on a 20-inch wheel. The difference is a wheel-package split, not a case of one size replacing the other during the same year.

That means a 2019 Acura Trucks RDX owner should confirm the exact wheel fitted to the vehicle rather than relying on the model year alone. Check the current tire sidewall, inspect the wheel diameter, and compare all four corners if the vehicle was acquired secondhand. A previous owner may have changed wheels, and that can alter which replacement size is actually correct.

Acura Trucks RDX uses three rim diameters across the years listed here: 18-inch, 19-inch, and 20-inch. The 2007-2018 range stays on 18-inch wheels, while 2019-2026 models move to either 19-inch or 20-inch wheels depending on configuration. The tire size itself tells you the wheel diameter on these metric radial fitments because the last number in the code is the rim size in inches.

Wheel diameter is the quickest way to narrow the correct replacement tire for Acura Trucks RDX. If the vehicle has 18-inch wheels, the choice is between the two earlier 18-inch sizes by model year; if it has 19-inch or 20-inch wheels, it falls into the later fitment group. Confirm the wheel before comparing widths or aspect ratios, since the wrong rim diameter simply will not fit properly.

A 2020 Acura Trucks RDX uses one of two sizes: 235/55R19 or 255/45R20. The correct choice depends on which wheel package is on the vehicle, because the two sizes fit different rim diameters and are not direct substitutes for one another. The 19-inch setup uses the 235/55R19 size, while the 20-inch setup uses the 255/45R20 size.

Start by reading the existing tire sidewall and confirming the wheel diameter on the vehicle itself. That is especially important on used Acura Trucks RDX models, where wheel changes are common and the year alone may not tell the whole story. Once the wheel diameter is confirmed, match the full tire code rather than choosing only by brand or tread style.

The currently listed Acura Trucks RDX products in 255/45R20 include Blackwall, RWL, and Redline sidewall styles. Blackwall is offered on several radial performance tires, while the Pro-Trac Street Pro III line appears in both RWL and Redline versions. Those sidewall differences are cosmetic choices built around the same basic 20-inch fitment category.

For most later Acura Trucks RDX applications, Blackwall is the most understated and modern-looking appearance. RWL or Redline can change the visual character of the vehicle, especially if the goal is a more custom or sport-styled look. Sidewall style should be chosen only after confirming the correct tire size, load range, and wheel diameter for the specific Acura Trucks RDX.

The currently listed Acura Trucks RDX products are offered by BFGoodrich, Nitto, and Pro-Trac. Those brands appear in the available 255/45R20 fitment, with multiple radial tire series represented across performance-oriented options. Each brand brings a different tread design and presentation, but they all fit the same 20-inch wheel size when the size code matches.

Brand choice comes after the fitment basics are settled. Once the correct Acura Trucks RDX size is confirmed, compare sidewall style, intended use, and the general character of the tread design rather than assuming every tire in the same diameter suits the same owner. A daily-driven late-model Acura Trucks RDX may call for a different feel than one used mainly for seasonal pleasure driving.

The listed Acura Trucks RDX 255/45R20 products include BFGoodrich g-Force Comp 2 AS, BFGoodrich g-Force Sport Comp 2, Nitto NT555 G2, and Pro-Trac Street Pro III. All are radial tire series, but they differ in branding, tread approach, and sidewall presentation. The Pro-Trac Street Pro III line also appears with RWL and Redline sidewall treatments, while the others are listed as Blackwall.

For Acura Trucks RDX owners, the main distinction is less about vintage-style construction and more about how the tire complements the vehicle's road use and appearance. A buyer focused on a cleaner OEM-style look may lean toward a Blackwall option, while a more personalized build may suit an RWL or Redline sidewall. Keep the comparison within the confirmed size and wheel diameter first, then choose the series that fits the intended personality of the vehicle.

A stored Acura Trucks RDX should be kept in a cool, dry, dark space away from direct sunlight, electric motors, welders, and ozone sources that age rubber. Tires last better when they are clean, properly inflated, and not left carrying the full vehicle weight in one position for months at a time. If the storage period will be extended, moving the vehicle occasionally or supporting it correctly can help reduce flat-spotting.

The practical goal is to preserve both the tire structure and ride quality between driving seasons. Acura Trucks RDX owners who keep the vehicle as a low-mileage specialty driver should check inflation before storage and again before returning it to service. Even modern radials benefit from careful storage habits, especially when replacement depends on a specific wheel package and size.

Tires on an Acura Trucks RDX should be inspected before regular road use and any time the vehicle has been parked for a long period. Look for cracking, punctures, irregular shoulder wear, sidewall bulges, and signs that inflation has dropped since the last drive. On later Acura Trucks RDX models with larger wheel packages, inspection also helps catch impact damage from potholes or curb contact.

Routine inspection is one of the simplest ways to avoid replacing a tire after damage has progressed too far. Check all four tires, not just the fronts, and compare wear patterns side to side. If one tire on an Acura Trucks RDX shows abnormal wear, it can point to alignment, suspension, or inflation issues that should be corrected before fitting another new tire.

An Acura Trucks RDX tire should be replaced when age, cracking, impact damage, bulges, repeated air loss, or internal deterioration make the casing questionable, even if tread depth still looks usable. Collector and specialty vehicles often age tires out before they wear them out, and that applies to low-mileage modern radials as well. Tread alone is not a complete measure of tire health.

The best approach is to treat tire age and condition as seriously as tread wear. If an Acura Trucks RDX has spent long periods parked, have the tires evaluated closely before resuming normal use, particularly on vehicles with larger wheel and lower-profile combinations that can hide age-related stiffness. Replacing an aged tire set together often maintains more predictable handling and ride quality.

The listed Acura Trucks RDX products are modern radial tires intended for road use when fitted in the correct size and wheel diameter and when the vehicle is mechanically sound. Safety depends on proper fitment, tire condition, inflation, alignment, and matching the tire to the actual wheel package on the vehicle. A 20-inch tire is not a safe substitute for a 19-inch wheel, and vice versa.

Before using an Acura Trucks RDX regularly on public roads, verify that the tires match the wheels and that the wheels match the vehicle's intended fitment. Then inspect age, wear, and pressure, and make sure the suspension and brakes are in proper condition. The tire itself is only one part of the safety picture, especially on a crossover that may see highway use.

Before driving an Acura Trucks RDX, check inflation pressure, visible tire condition, and whether all four tires are the correct size for the wheel package fitted to the vehicle. Also look for cuts, bulges, uneven wear, embedded debris, and any sign that one tire has been losing air. On 2019 and newer Acura Trucks RDX models, confirm that the vehicle is not mixed between 19-inch and 20-inch fitments.

A quick walk-around catches many problems before they become roadside issues. If the Acura Trucks RDX has been parked for an extended period, the check should be more thorough and include a short low-speed evaluation for vibration or flat spotting. Any unusual pull, shake, or repeated pressure loss should be corrected before the vehicle goes back into normal service.

The appropriate speed for an Acura Trucks RDX depends on using the correct size, maintaining proper condition, and respecting the service character of the tire fitted. Modern radial tires in the listed sizes are designed for normal road use, but that does not override the need for sound suspension, correct inflation, and matched wheel-and-tire combinations. Tire condition matters as much as the size code when determining safe operation.

For a practical owner, that means driving within legal limits and within the comfort zone of the vehicle as equipped, rather than treating the size alone as a performance guarantee. If an Acura Trucks RDX is used only occasionally, inspect the tires carefully before extended highway travel. A fresh, correctly fitted set will usually inspire far more confidence than an aged set with plenty of remaining tread.