The 2016 GMC Trucks Acadia sits in the three-row crossover era when family utility, highway comfort, and upscale trim distinctions often showed up in wheel and tire packages as much as in cabin features. For Acadia buyers today, tire selection starts with identifying the exact trim, because this model uses three different primary radial sizes: 255/65R18, 255/60R19, and 255/55R20. That makes the decision less about choosing between bias-ply and radial construction and more about confirming wheel diameter, preserving the right overall look, and comparing available tire options in the correct size. Getting that first step right helps maintain proper stance, clearance, and everyday road manners.
Which Tire Size Is Right for The 2016 GMC Trucks Acadia
The 2016 GMC Trucks Acadia uses three primary tire sizes, and the correct one depends on the specific sub-model and wheel diameter. All three are radial metric sizes with very similar overall dimensions, but they are built for different 18-inch, 19-inch, or 20-inch wheel setups, so confirming the exact rim diameter on the vehicle comes first before comparing tires.
A 255/55R20 tire is a metric radial size with a 255 millimeter section width, a 55-series aspect ratio, and fitment for a 20-inch rim. On the 2016 GMC Trucks Acadia, this size is part of a larger-wheel trim setup and keeps the vehicle in a modern radial construction rather than a vintage bias-ply format. The lower profile relative to the other Acadia sizes gives this fitment a distinct visual character tied to the 20-inch wheel package. It is the right size to evaluate only after confirming that the vehicle is equipped with the matching 20-inch wheels.
A 255/65R18 tire uses the same 255 millimeter nominal width as the other Acadia sizes, but its 65-series profile is paired with an 18-inch rim. This keeps the 2016 GMC Trucks Acadia in a radial construction while matching the wheel package used on specific sub-models rather than every version of the vehicle. Although the overall diameter stays close to the other Acadia fitments, the wheel size is different and should not be treated as automatically interchangeable. It is the correct size to consider when the vehicle retains its 18-inch wheel setup and stock-style clearance.
A 255/60R19 tire is a metric radial size that combines a 255 millimeter section width with a 60-series aspect ratio on a 19-inch rim. For the 2016 GMC Trucks Acadia, it fills the middle ground between the 18-inch and 20-inch wheel packages while staying very close in overall tire height. The key distinction is not construction but wheel diameter, so this size belongs only on the Acadia configurations built around 19-inch wheels. It is the size to review when preserving the vehicle's original trim-level wheel package matters as much as the tire choice itself.
Tire fitment for the 2016 GMC Trucks Acadia varies by sub-model, and each trim is tied to its own wheel diameter. Identifying whether the vehicle is an SL, SLE, SLT, or Denali is the first step before choosing a tire, because the primary size changes with the trim package.
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2016 GMC Trucks Acadia Denali
The 2016 GMC Trucks Acadia Denali uses a 255/55R20 radial tire, tying it to the 20-inch wheel package rather than the smaller-wheel Acadia trims. Tire selection here starts with keeping that 20-inch fitment in place and then comparing options that preserve proper proportions and clearance.
The 2016 GMC Trucks Acadia SL uses a 255/65R18 radial tire on an 18-inch wheel setup. That makes the main tire decision straightforward once the trim is confirmed, with attention focused on selecting the correct 18-inch size rather than crossing into the 19-inch or 20-inch packages.
The 2016 GMC Trucks Acadia SLE shares the 255/65R18 radial fitment used on the SL. For replacement purposes, the priority is matching the existing 18-inch wheel setup and verifying that no aftermarket wheel or suspension change has altered the tire requirements.
The 2016 GMC Trucks Acadia SLT uses a 255/60R19 radial tire, placing it between the 18-inch and 20-inch Acadia trim packages. Choosing tires for an SLT means confirming that the vehicle still carries its 19-inch wheels before comparing options in the proper size.
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.
Frequently Asked Questions
Tire questions for the 2016 GMC Trucks Acadia usually center on trim-specific sizing, wheel diameter, and how to avoid mixing 18-inch, 19-inch, and 20-inch fitments. The FAQs below focus on selecting the right radial size, preserving proper fitment, and checking the vehicle before regular road use.
Tire Size & Fitment
What tire size fits a 2016 GMC Trucks Acadia?
The 2016 GMC Trucks Acadia uses three primary tire sizes: 255/65R18, 255/60R19, and 255/55R20. The correct size depends on the sub-model, with SL and SLE using 255/65R18, SLT using 255/60R19, and Denali using 255/55R20.
Choosing the right tire starts with confirming the trim and the wheel diameter currently on the vehicle. These sizes are close in overall height, but they are built for different rim diameters, so the safest path is to match the tire to the exact wheel package rather than choosing by appearance alone.
What size rim does a 2016 GMC Trucks Acadia use?
A 2016 GMC Trucks Acadia can use 18-inch, 19-inch, or 20-inch rims, depending on the sub-model. The 255/65R18 fitment uses an 18-inch rim, the 255/60R19 fitment uses a 19-inch rim, and the 255/55R20 fitment uses a 20-inch rim.
Rim diameter is the first thing to verify before buying tires, because the three Acadia sizes are not meant for the same wheel. Checking the wheel itself is especially important if the vehicle has had a trim swap, aftermarket wheels, or prior tire replacement that may not reflect the original setup.
Do all 2016 GMC Trucks Acadia sub-models use the same tire size?
No, the 2016 GMC Trucks Acadia does not use one tire size across every sub-model. The SL and SLE use 255/65R18, the SLT uses 255/60R19, and the Denali uses 255/55R20, so fitment changes with the trim.
That matters because each size is tied to a different wheel diameter, not just a different sidewall profile. Matching the vehicle's exact trim and actual wheel setup helps prevent ordering a tire that looks close on paper but is built for the wrong rim.
Choosing the Right Tire
What should I consider when choosing a 2016 GMC Trucks Acadia tire?
Start with the correct tire size for the specific Acadia trim, then confirm that the wheel diameter on the vehicle still matches that size. The 2016 GMC Trucks Acadia uses only radial tire constructions in these fitments, so the main decision is proper size rather than bias-ply versus radial conversion.
Once the fitment is confirmed, compare tires by intended use, road manners, load suitability, and how closely the replacement matches the vehicle's current setup. Vehicles with replacement wheels or suspension changes deserve an extra clearance check at full steering lock and through normal suspension travel.
How do I choose between the available 255/65R18, 255/60R19, and 255/55R20 tires for a 2016 GMC Trucks Acadia?
The choice is not between all three sizes on one vehicle, but between the size that matches the Acadia's trim and wheel package. SL and SLE use 255/65R18, SLT uses 255/60R19, and Denali uses 255/55R20, so the correct fitment is determined before comparing tire models.
After that, focus on the characteristics that matter for how the Acadia is driven, including ride preference, seasonal use, and the condition of the existing wheels. Keeping the original wheel diameter in place helps preserve the proportions and clearance intended for that trim package.
Why does the 2016 GMC Trucks Acadia have more than one tire size?
The 2016 GMC Trucks Acadia uses more than one tire size because different sub-models were paired with different wheel diameters. Even though 255/65R18, 255/60R19, and 255/55R20 are very close in overall diameter, each size is matched to a specific 18-inch, 19-inch, or 20-inch wheel setup.
That approach lets different trims carry distinct wheel and tire presentations without dramatically changing overall tire height. For replacement, the important point is not which size seems closest, but which size belongs on the wheels currently fitted to the vehicle.
Restoration & Appearance
Does correct tire fitment matter for a 2016 GMC Trucks Acadia restoration or preservation project?
Yes, correct tire fitment still matters on a 2016 GMC Trucks Acadia, especially if the goal is to preserve the look and proportions of a specific trim. The Denali, SLT, and SL or SLE each use different wheel diameters, so the tire choice affects both stance and visual balance.
A preservation-minded replacement usually starts by keeping the correct size for the trim rather than mixing wheel packages. Owners who want to return a modified Acadia to stock-style appearance should confirm the wheel diameter first, then select a tire that matches the original fitment category for that sub-model.
Which tire fitment should I keep for a period-style 2016 GMC Trucks Acadia?
A period-style 2016 GMC Trucks Acadia is best served by retaining the trim-specific size already associated with that model: 255/65R18 for SL and SLE, 255/60R19 for SLT, and 255/55R20 for Denali. Keeping the original size family maintains the intended relationship between wheel diameter and sidewall profile.
That does not mean every replacement tire will have the same visual character, but it keeps the vehicle in the right fitment lane. If exact appearance matters, compare the current wheel setup carefully and avoid changing diameters unless the entire wheel-and-tire package is being evaluated together.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2016 GMC Trucks Acadia?
Yes, modifications can affect tire fitment on a 2016 GMC Trucks Acadia even when the tire size sounds close to stock. Aftermarket wheels, changes in wheel offset, lowering or lifting, and suspension wear can all influence how a 255/65R18, 255/60R19, or 255/55R20 tire sits in the wheel opening.
A modified Acadia should be checked for rim diameter, wheel width, steering clearance, and fender clearance before replacement tires are chosen. Looking at actual space around the tire at full lock and under normal suspension movement helps avoid conflicts that a size code alone cannot predict.
What should I inspect before driving a 2016 GMC Trucks Acadia on new tires?
Before regular road use, inspect the wheel condition, valve stems, lug hardware, and tire pressure, then make sure all four tires match the intended size for the vehicle's wheel package. It is also wise to look for any rubbing points, uneven suspension height, or alignment-related wear patterns.
A short test drive should confirm that the Acadia tracks properly, clears at full steering lock, and does not show vibration or unusual noise. Rechecking pressure and lug torque after initial use is a sensible step, especially if the vehicle has sat for a while or recently received wheel service.
How often should tires on a 2016 GMC Trucks Acadia be inspected?
Tires on a 2016 GMC Trucks Acadia should be inspected regularly, not just when tread looks worn. A routine check should include pressure, tread condition, sidewall cracking, cuts, bulges, and signs of uneven wear that may point to alignment or suspension issues.
Vehicles that spend long periods parked deserve extra attention because age, underinflation, and static loading can affect the tires even when mileage stays low. A quick visual check before longer drives and a closer inspection at service intervals help catch issues before they become road-use problems.
