The 2019 Acura Trucks RDX sits in the modern luxury crossover segment, where sharp styling, everyday usability, and confident road manners matter as much as premium comfort. For owners, tire selection is less about antique sizing conventions and more about matching the exact wheel package fitted to the vehicle. This RDX uses either 235/55R19 or 255/45R20 radial tires, depending on sub-model. That creates a clear choice between the 19-inch setup and the more aggressive 20-inch A-Spec fitment, along with differences in available brands and sidewall treatments. Before choosing, confirm the exact trim and wheel diameter already on the vehicle, especially if wheels have been changed.
Which Tire Size Is Right for The 2019 Acura Trucks RDX
The 2019 Acura Trucks RDX uses two primary tire sizes, and the correct one depends on the exact sub-model and wheel package. Both are radial fitments, but they use different rim diameters: 19-inch wheels with 235/55R19 tires and 20-inch wheels with 255/45R20 tires. The first step is confirming whether the vehicle has the standard-style 19-inch setup or the 20-inch A-Spec configuration before comparing tire choices.
255/45R20 is a modern metric radial size in which 255 is the nominal section width in millimeters, 45 is the aspect ratio, R identifies radial construction, and 20 is the rim diameter in inches. On the 2019 Acura Trucks RDX, this size is tied to the 20-inch wheel fitment used on A-Spec configurations. Available choices include BFGoodrich, Nitto, and Pro-Trac options, with Blackwall, raised white letter, and Redline sidewall treatments. This size is the one to evaluate when the vehicle already carries the larger 20-inch wheel package and the owner wants to compare appearance and tire-series character within that setup.
235/55R19 is a modern metric radial size where 235 indicates nominal section width in millimeters, 55 is the aspect ratio, R marks radial construction, and 19 designates the wheel diameter in inches. For the 2019 Acura Trucks RDX, this size serves the 19-inch wheel fitment used across several non-A-Spec sub-models. Its practical role is straightforward: it keeps selection centered on the correct wheel diameter and overall fitment family for the standard RDX configurations. Before choosing a tire in this size, verify that the vehicle still has its original 19-inch wheel setup and has not been changed to an aftermarket 20-inch package.
Sub-model fitment matters on the 2019 Acura Trucks RDX because tire size changes with the wheel package. Most covered trims use 235/55R19, while A-Spec versions move to 255/45R20, so confirming the exact sub-model is the quickest way to narrow the correct tire choice.
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2019 Acura Trucks RDX A-Spec
The 2019 Acura Trucks RDX A-Spec uses the 255/45R20 radial fitment rather than the 19-inch setup found on other trims. That makes wheel diameter confirmation especially important before comparing brands or deciding between Blackwall, raised white letter, or Redline presentation.
The 2019 Acura Trucks RDX Advance Pkg. uses the 235/55R19 radial tire size. Tire selection here centers on keeping the correct 19-inch fitment in place and verifying that the vehicle has not been changed to a different wheel package.
The 2019 Acura Trucks RDX Base uses the 235/55R19 radial size. That keeps fitment straightforward, with the main task being confirmation of the existing 19-inch wheels before moving on to product or brand comparisons.
The 2019 Acura Trucks RDX SH-AWD uses 235/55R19 radial tires. For this sub-model, the important step is matching the tire to the 19-inch wheel setup and checking that no previous owner changed the wheel and tire package.
The 2019 Acura Trucks RDX SH-AWD A-Spec uses the larger 255/45R20 radial fitment. That points the selection process toward 20-inch tire choices and makes it worthwhile to compare available sidewall styles and series within the correct size.
The 2019 Acura Trucks RDX SH-AWD Advance Pkg. uses 235/55R19 radial tires. Choosing the right tire starts with preserving that 19-inch fitment and confirming the current wheel setup before considering any substitute wheel or tire package.
The 2019 Acura Trucks RDX SH-AWD Tech Pkg. uses the 235/55R19 radial size. The fitment question is mostly a matter of making sure the vehicle still carries its 19-inch wheels and then choosing a tire suited to normal road use and trim-appropriate appearance.
The 2019 Acura Trucks RDX Tech Pkg. uses 235/55R19 radial tires. That keeps the tire decision focused on the standard 19-inch wheel configuration rather than the larger A-Spec fitment used on certain other RDX versions.
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 Trucks RDX Tires for Sale
Current product choices center on 255/45R20, with radial options from BFGoodrich, Nitto, and Pro-Trac. Buyers can compare tire series and sidewall treatments including Blackwall, raised white letter, and Redline within the 20-inch A-Spec fitment.
The most common 2019 Acura Trucks RDX tire questions center on trim-specific size differences, 19-inch versus 20-inch wheel fitment, available 255/45R20 product choices, and the inspections worth making before regular road use.
Tire Size & Fitment
What tire size fits a 2019 Acura Trucks RDX?
The 2019 Acura Trucks RDX uses either 235/55R19 or 255/45R20 tires. Both are radial sizes, but they are not used across every version of the vehicle. Most covered sub-models use 235/55R19, while A-Spec and SH-AWD A-Spec versions use 255/45R20.
The key step is identifying the exact sub-model and confirming the wheel diameter already on the RDX. A vehicle that has been changed to aftermarket wheels may no longer match its original trim-based setup, so checking the current wheel and tire combination before ordering helps avoid selecting the wrong size.
What size rim does a 2019 Acura Trucks RDX use?
A 2019 Acura Trucks RDX uses either a 19-inch or 20-inch rim, depending on sub-model. The 235/55R19 tire fits the 19-inch setup, while the 255/45R20 tire fits the 20-inch setup used on A-Spec configurations.
Rim diameter should be confirmed before anything else because a 19-inch tire and a 20-inch tire are not interchangeable across the same wheel. It also helps to inspect the wheel itself for markings and verify that the vehicle has not been upgraded or changed from its original trim package over time.
Do all 2019 Acura Trucks RDX sub-models use the same tire size?
No. The 2019 Acura Trucks RDX does not use one tire size across every covered sub-model. Base, Tech Pkg., Advance Pkg., SH-AWD, SH-AWD Tech Pkg., and SH-AWD Advance Pkg. use 235/55R19, while A-Spec and SH-AWD A-Spec use 255/45R20.
That difference matters because the two sizes are tied to different wheel diameters. Tire shopping is much easier once the exact trim is confirmed, but it is still wise to inspect the current wheel and tire setup on the vehicle since wheel swaps can blur the line between original sub-model fitment and present-day configuration.
Choosing the Right Tire
What should I consider when choosing a 255/45R20 tire for a 2019 Acura Trucks RDX?
Start with the correct size, radial construction, and 20-inch wheel fitment. In 255/45R20, the available choices include several tire series from BFGoodrich, Nitto, and Pro-Trac, along with sidewall treatments such as Blackwall, raised white letter, and Redline.
After size is confirmed, compare the tire’s presentation and wheel compatibility with the way the RDX is actually used. Some products list an 8.0 to 9.5 inch rim-width range, so checking the wheel width can be worthwhile, especially on vehicles that no longer wear their original wheels.
What sidewall styles are available for 2019 Acura Trucks RDX tires?
For the 255/45R20 fitment used on A-Spec versions of the 2019 Acura Trucks RDX, available sidewall styles include Blackwall, raised white letter, and Redline. Those choices give the same basic size a noticeably different visual character without changing the primary wheel diameter.
The right sidewall depends on how subtle or attention-grabbing the owner wants the vehicle to look. Blackwall keeps the appearance clean and modern, while raised white letter and Redline add a more expressive performance look, so it helps to match the tire’s appearance to the wheel design and overall style of the RDX.
What brands offer tires for the 2019 Acura Trucks RDX?
Available tires for the 2019 Acura Trucks RDX 255/45R20 fitment include products from BFGoodrich, Nitto, and Pro-Trac. Those options span multiple tire series, giving buyers a useful mix of modern radial choices within the larger 20-inch RDX setup.
Brand alone should not make the decision. It is better to compare the exact size, the tire series, the sidewall style, and any wheel-width or load details shown for the specific tire, then match those factors to the wheel package and the kind of appearance or road use expected from the RDX.
Restoration & Appearance
How important is correct tire fitment to the appearance of a 2019 Acura Trucks RDX?
Correct tire fitment matters because the 2019 Acura Trucks RDX uses two different wheel-and-tire packages, and each gives the vehicle a distinct stance. The 235/55R19 setup supports the standard 19-inch presentation, while the 255/45R20 setup belongs to the A-Spec wheel package.
Appearance can change quickly when the wrong size is placed on the wrong wheel diameter or when an aftermarket package alters the proportions of the vehicle. Owners who want to preserve the intended look of a specific trim should confirm both the sub-model and the wheels currently on the RDX before choosing tires.
Which sidewall style suits a 2019 Acura Trucks RDX A-Spec?
The 255/45R20 fitment used on a 2019 Acura Trucks RDX A-Spec is available with Blackwall, raised white letter, and Redline sidewall treatments. Each one keeps the same basic size while changing the visual emphasis of the tire and wheel package.
Blackwall gives the cleanest contemporary look, while raised white letter and Redline create a more assertive performance-inspired appearance. Since sidewall style is an appearance choice rather than a trim-authenticity guarantee, it makes sense to select the version that best matches the wheel finish and the owner’s preferred presentation.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Acura Trucks RDX?
Yes. Modifications can affect tire fitment on a 2019 Acura Trucks RDX even when the tire size itself appears close to original. Wheel changes, offset differences, suspension lowering, and body or brake upgrades can all alter the space available around the tire.
A modified RDX should be checked for wheel diameter, wheel width, and clearance at full steering lock and through suspension movement before replacing tires. That matters most when moving between the 19-inch and 20-inch packages or when the vehicle has aftermarket wheels that no longer match the original sub-model configuration.
What should I inspect before driving a 2019 Acura Trucks RDX on new tires?
Before driving a 2019 Acura Trucks RDX on new tires, inspect the wheel size, lug hardware, valve stems, and the visible clearance around the tires. It is also smart to verify that all four tires match the intended size for the sub-model and that inflation pressure has been set correctly.
A short initial drive should include attention to vibration, rubbing, steering pull, or any sign that the wheel-and-tire combination is not seated or balanced properly. Rechecking pressure and visually inspecting the sidewalls after the first miles can help catch fitment or installation issues before routine driving resumes.
How often should tires on a 2019 Acura Trucks RDX be inspected?
Tires on a 2019 Acura Trucks RDX should be inspected regularly, not just when tread looks worn. A quick visual check for cracking, cuts, uneven wear, bulges, or low inflation is worthwhile throughout normal use, especially on a vehicle that may alternate between daily driving and longer highway trips.
Frequent inspection becomes even more important if the RDX has larger wheels, aftermarket suspension parts, or a recent tire change. Catching wear patterns early can point to alignment or clearance problems before they become serious, and it also helps confirm that the tires continue to suit the current wheel setup on the vehicle.
