The 2019 GMC Trucks Acadia sits in the modern midsize SUV class, blending family-duty practicality with the more rugged image GMC built into trims like All Terrain and Denali. For this exact Acadia, tire selection centers on trim-specific metric radial sizes rather than one universal fitment, with 17-, 18-, and 20-inch wheel packages all appearing across the lineup. That makes the first step confirming the exact sub-model and wheel diameter before choosing a tire. Buyers comparing options in the available 17-inch sizes will also notice an all-terrain, raised white letter presentation, while the broader fitment question remains matching the tire to the vehicle's setup and intended use.
Which Tire Size Is Right for The 2019 GMC Trucks Acadia
The 2019 GMC Trucks Acadia uses four primary tire sizes, and the right one depends on the exact sub-model and wheel diameter. All of these are metric radial fitments, but they are spread across 17-, 18-, and 20-inch rims. Before selecting a tire, confirm whether the Acadia is an All Terrain, Denali, SL, SLE, or SLT and then verify the wheel size currently on the vehicle, especially if wheels have been changed.
235/55R20 is a metric radial size in which 235 identifies the nominal section width in millimeters, 55 is the aspect ratio, R indicates radial construction, and 20 is the rim diameter in inches. On the 2019 GMC Trucks Acadia, this size belongs to 20-inch wheel applications and appears on more than one sub-model, including Denali. Its lower-profile format gives this fitment a distinctly modern SUV character compared with the taller-sidewall 17- and 18-inch sizes. Use this size only after confirming that the Acadia is equipped with the correct 20-inch wheels and has not been changed to another wheel package.
235/65R18 is a metric radial tire size, with a 235-millimeter nominal section width, a 65-series aspect ratio, radial construction, and an 18-inch rim diameter. For the 2019 GMC Trucks Acadia, this size serves specific trims that use an 18-inch wheel package rather than the 17- or 20-inch alternatives. Its proportions place it between the lower-profile 20-inch fitment and the taller all-terrain-oriented 17-inch choices. This is the size to evaluate when the vehicle keeps its 18-inch wheel setup and the goal is maintaining the proper fitment basis for that configuration.
255/65R17 is a metric radial size that uses a 255-millimeter nominal section width, a 65-series profile, and a 17-inch rim diameter. On the 2019 GMC Trucks Acadia, it applies to certain 17-inch-wheel configurations and stands out as the wider of the two 17-inch fitments. Available products in this size include a BFGoodrich All-Terrain T/A KO2 with raised white letter sidewalls, giving it a more aggressive visual style than a plain highway-oriented radial. This size deserves close attention when the Acadia has a 17-inch setup and the owner wants to confirm both wheel compatibility and the desired overall tire character.
245/65R17 is a metric radial tire size, with 245 indicating nominal section width in millimeters, 65 identifying the aspect ratio, and 17 indicating rim diameter in inches. For the 2019 GMC Trucks Acadia, this is another 17-inch-wheel fitment, but it is distinct from the wider 255/65R17 and should not be chosen interchangeably without checking the vehicle's exact configuration. Available products include a BFGoodrich All-Terrain T/A KO2 with raised white letter sidewalls, adding a more rugged look to this size. It is the right size to assess when the Acadia carries the corresponding 17-inch wheel package and that specific width range.
Sub-model fitment matters on the 2019 GMC Trucks Acadia because the lineup does not use one universal tire size. Some trims share multiple possible fitments, while others are tied to a single wheel and tire package, so confirming the exact sub-model is the clearest way to narrow the correct starting point.
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2019 GMC Trucks Acadia All Terrain
The 2019 GMC Trucks Acadia All Terrain uses more than one radial tire size, so selection starts with confirming which wheel package is actually on the vehicle. Once that is established, the decision shifts to staying with the correct metric size and choosing the tire style that matches how the Acadia is used.
The 2019 GMC Trucks Acadia Denali uses a single primary radial tire size, which makes fitment more straightforward than on some other trims. Tire selection then becomes a matter of confirming the 20-inch wheel setup and choosing a tire that suits the vehicle's road use and overall presentation.
The 2019 GMC Trucks Acadia SL is tied to one 17-inch radial fitment rather than the larger-wheel packages found elsewhere in the lineup. That makes it important to stay with the correct size basis and compare tire choices with attention to wheel compatibility, appearance, and intended driving use.
The 2019 GMC Trucks Acadia SLE spans several radial tire sizes, so the trim name alone is not enough to choose a tire. Wheel diameter should be confirmed first, and then the correct size can be matched to the vehicle before comparing available tread style and sidewall presentation.
The 2019 GMC Trucks Acadia SLT uses multiple radial fitments depending on the wheel package, which makes a quick wheel check especially important. After that, the focus moves to selecting the correct metric size and deciding whether the vehicle calls for a more road-oriented or more rugged tire presentation.
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 GMC Trucks Acadia Tires for Sale
Available product choices for the 2019 GMC Trucks Acadia center on the 17-inch sizes, with BFGoodrich All-Terrain T/A KO2 options in 245/65R17 and 255/65R17. These radial tires share an all-terrain character and raised white letter sidewall styling, while differing in size and rim-width compatibility.
The most common questions for the 2019 GMC Trucks Acadia focus on trim-specific tire size, wheel diameter, 17-inch all-terrain choices, and what to inspect before putting a daily-driven or lightly used SUV back on the road.
Tire Size & Fitment
What tire size fits a 2019 GMC Trucks Acadia?
The 2019 GMC Trucks Acadia uses four primary tire sizes: 235/55R20, 235/65R18, 255/65R17, and 245/65R17. All are radial sizes, but they do not apply across every Acadia trim in the same way, so there is no single universal fitment for the entire model lineup.
The practical first step is identifying the exact sub-model and confirming the wheel diameter currently on the vehicle. Denali uses 235/55R20, while trims such as All Terrain, SLE, and SLT can appear with more than one size, and SL uses 245/65R17. If the Acadia has aftermarket wheels, verify the actual setup before choosing a replacement tire.
What size rim does a 2019 GMC Trucks Acadia use?
A 2019 GMC Trucks Acadia can use 17-inch, 18-inch, or 20-inch rims depending on the sub-model and wheel package. Those rim diameters correspond to the four primary tire sizes used on this vehicle, so the rim size is a basic fitment detail rather than a minor specification.
Checking the wheel itself is especially important on SLE, SLT, and All Terrain models because those trims can appear with different tire sizes. The tire size already mounted on the vehicle is often the quickest confirmation point, but the wheel should still be verified directly if there is any chance the Acadia has had wheels or tires changed in the past.
Do all 2019 GMC Trucks Acadia sub-models use the same tire size?
No, 2019 GMC Trucks Acadia sub-models do not all use the same tire size. Denali uses 235/55R20, SL uses 245/65R17, and trims such as All Terrain, SLE, and SLT can use multiple sizes depending on the wheel package fitted to the vehicle.
That variation means the trim badge alone may not settle the question on every Acadia. Buyers should match the sub-model and then confirm the wheel diameter before comparing tires, especially on trims with 17-, 18-, and 20-inch possibilities. Using the wrong size basis can create unnecessary confusion even when the vehicle still appears outwardly stock.
Choosing the Right Tire
What should I consider when choosing a 17-inch tire for a 2019 GMC Trucks Acadia?
Start by confirming whether the Acadia needs 245/65R17 or 255/65R17, because both are used on 17-inch wheel applications but they are not the same size. The available 17-inch products shown here are radial BFGoodrich All-Terrain T/A KO2 tires, so the main comparison begins with the correct size rather than brand variety.
After size confirmation, compare the wheel's width range against the tire's rim-width specification and think about how the vehicle is driven. Raised white letter sidewalls and an all-terrain tire series create a more rugged visual character than a plain touring-style tire. Clearance, wheel setup, and intended use matter more than choosing by appearance alone.
What sidewall styles are available for 2019 GMC Trucks Acadia tires?
Among the currently available products for the 2019 GMC Trucks Acadia, the 17-inch options use RWL sidewalls. That means raised white letter styling, which gives the tire a more assertive truck- and SUV-oriented look than a plain blackwall sidewall treatment.
Sidewall style is mostly an appearance decision once the correct tire size has been confirmed. On an Acadia with 17-inch fitment, raised white letter tires can suit a more rugged presentation, especially with all-terrain tread styling. The important point is to choose sidewall appearance after the proper size and wheel compatibility have already been established.
What brands offer tires for the 2019 GMC Trucks Acadia?
The available products shown for 17-inch 2019 GMC Trucks Acadia fitments come from BFGoodrich. Both 245/65R17 and 255/65R17 are represented by the BFGoodrich All-Terrain T/A KO2, so the current visible product variation is centered on size rather than a wide brand spread.
That means the buyer's comparison is less about ranking brands and more about making sure the exact size matches the Acadia's wheel package. A 17-inch setup still requires checking whether the vehicle uses the 245 or 255 section-width fitment, and it is also worth reviewing rim-width compatibility and the intended road-versus-all-terrain use before selecting the tire.
Restoration & Appearance
Does correct tire fitment matter for a 2019 GMC Trucks Acadia restoration?
Yes, correct tire fitment still matters on a 2019 GMC Trucks Acadia even though it is a modern SUV rather than a vintage restoration subject. The Acadia uses multiple trim-specific radial sizes, so keeping the proper size and wheel-diameter relationship helps preserve the vehicle's intended stance, appearance, and fitment balance.
Owners aiming for a clean, original-style presentation should begin with the exact sub-model and wheel package before making appearance decisions. A Denali on 20-inch wheels presents differently from an SL on 17-inch wheels, and an all-terrain raised white letter tire changes the look further. Correct size selection is the foundation for any restoration-minded or detail-oriented cosmetic result.
How does tire construction affect the appearance of a restored 2019 GMC Trucks Acadia?
On the 2019 GMC Trucks Acadia, construction is straightforward because the primary fitments are radial across the lineup. That means appearance differences come less from bias-ply-versus-radial questions and more from the chosen size, wheel diameter, tread style, and sidewall presentation within the correct radial fitment.
A 20-inch radial gives the Acadia a different visual balance than a 17-inch radial with a taller sidewall, and raised white letter all-terrain tires create a more rugged look than a plain road-oriented presentation. Anyone pursuing a tidy, restoration-minded appearance should match the tire to the vehicle's actual trim and wheel setup before focusing on cosmetic details.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 GMC Trucks Acadia?
Yes, modifications can affect tire fitment on a 2019 GMC Trucks Acadia. Wheel changes, suspension alterations, ride-height adjustments, and even small offset differences can change how a 245/65R17, 255/65R17, 235/65R18, or 235/55R20 sits in the wheel opening and how it clears suspension and steering components.
An Acadia with aftermarket wheels should be checked carefully before assuming the original size basis still applies exactly as expected. Rim diameter is only one part of the picture; wheel width and the available space at full steering lock also matter. A quick inspection now can prevent rubbing, mismatch, or unnecessary guesswork during tire replacement.
What should I inspect before driving a 2019 GMC Trucks Acadia on new tires?
Before driving a 2019 GMC Trucks Acadia on new tires, inspect the wheel size, confirm the tire size matches the sub-model's setup, and check that each tire is inflated properly. It is also wise to look over the wheels for damage and make sure the tires seat evenly and clear the suspension and bodywork.
A short road test should include attention to steering feel, vibration, and any contact noises at parking-lot speeds and during full turns. Vehicles that have sat for long periods deserve an extra look at brakes, alignment condition, and valve stems as well. New tires perform best when the rest of the rolling and steering system is in sound shape.
How often should tires on a 2019 GMC Trucks Acadia be inspected?
Tires on a 2019 GMC Trucks Acadia should be inspected regularly, not just when tread looks low. Routine checks for air pressure, uneven wear, cuts, bulges, embedded debris, and sidewall damage help catch problems early, especially on an SUV that may alternate between daily use and longer idle periods.
Monthly inspections are a sensible baseline, with an extra check before trips or after impacts such as potholes or curb contact. Any Acadia running 17-inch all-terrain tires also benefits from watching for irregular wear patterns that may point to alignment or suspension issues. Consistent inspection is one of the simplest ways to protect correct fitment and road manners.
