The 2013 GMC Trucks Acadia sits in the family-crossover segment where passenger comfort, road manners, and year-round usability matter just as much as styling. Buyers today often approach it as a practical daily driver, a well-kept long-distance vehicle, or a clean used example that still needs the right stance and ride quality. Tire fitment on the 2013 GMC Trucks Acadia centers on radial construction, but the exact size depends on sub-model and wheel diameter, with 18-inch, 19-inch, and 20-inch applications all in play. That makes the real decision less about tire construction and more about identifying the correct size, matching the wheel, and choosing a tire that suits how the vehicle is actually used.
Which Tire Size Is Right for The 2013 GMC Trucks Acadia
The 2013 GMC Trucks Acadia uses three primary tire sizes, and the right one depends on the exact sub-model and wheel diameter. All three are radial fitments, but 255/65R18, 255/60R19, and 255/55R20 each correspond to a different 18-inch, 19-inch, or 20-inch rim. The first step is confirming which wheels are on the vehicle before comparing tire choices.
255/55R20 is a metric radial size in which 255 identifies the nominal section width in millimeters, 55 is the aspect ratio, R indicates radial construction, and 20 is the wheel diameter in inches. On the 2013 GMC Trucks Acadia, this size belongs on a 20-inch rim and is one of the larger-wheel fitments used across multiple sub-models. Its overall dimensions stay very close to the other Acadia sizes, but wheel diameter is different, so matching the tire to the actual wheel is critical. This is the size to evaluate when the vehicle is equipped with factory-style or replacement 20-inch wheels.
255/65R18 is a metric radial size with a 255-millimeter nominal section width, a 65-series profile, radial construction, and an 18-inch rim diameter. For the 2013 GMC Trucks Acadia, this size serves the 18-inch wheel application and is distinct from the 19-inch and 20-inch fitments even though the overall tire height is very similar. That close diameter relationship can make the sizes look comparable at a glance, but the wheel itself determines what can be used. This is the fitment to confirm when an Acadia SL or SLE is riding on 18-inch wheels.
255/60R19 follows the same metric radial format, with 255 for section width in millimeters, 60 for aspect ratio, R for radial construction, and 19 for the wheel diameter. On the 2013 GMC Trucks Acadia, it is the 19-inch application and appears on specific sub-model configurations rather than across the full range. Its dimensions are very close to the other primary Acadia sizes, but that does not make it interchangeable without the proper wheel. This size deserves a careful look when selecting tires for an SLT equipped with 19-inch wheels.
Sub-model fitment matters on the 2013 GMC Trucks Acadia because tire size changes with wheel package and trim. Some versions share the same 20-inch size, while others use 18-inch or 19-inch applications, so identifying the exact sub-model and wheel setup comes first.
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2013 GMC Trucks Acadia Denali
The 2013 GMC Trucks Acadia Denali uses the 255/55R20 radial fitment. Tire selection here starts with confirming the 20-inch wheel, then choosing a replacement tire that matches the intended balance of ride quality, appearance, and everyday road use.
The 2013 GMC Trucks Acadia SL can use either 255/55R20 or 255/65R18, so wheel diameter must be confirmed before choosing a tire. Once the wheel size is verified, the decision becomes a straightforward radial replacement in the proper metric size.
The 2013 GMC Trucks Acadia SLE also appears with either 255/55R20 or 255/65R18 radial tires. That makes wheel confirmation especially important, particularly on used vehicles where replacement wheels or trim swaps may have changed the original setup.
The 2013 GMC Trucks Acadia SLT uses either 255/55R20 or 255/60R19 depending on wheel configuration. Tire selection should begin with the actual rim diameter on the vehicle, since both sizes are close in overall height but require different wheels.
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
Questions around the 2013 GMC Trucks Acadia usually come down to the right tire size, matching the correct wheel diameter, and understanding how fitment changes by sub-model. The FAQs below focus on those decisions, along with practical checks for maintenance, replacement, and road use.
Tire Size & Fitment
What tire size fits a 2013 GMC Trucks Acadia?
A 2013 GMC Trucks Acadia uses one of three radial tire sizes: 255/65R18, 255/60R19, or 255/55R20. The correct size depends on the sub-model and wheel package, with 18-inch, 19-inch, and 20-inch rim applications all used within the Acadia range.
The most important step is checking the actual wheel diameter on the vehicle rather than assuming every Acadia uses the same tire. A used crossover may have had wheel changes over time, so the safest approach is to confirm the rim size and then match the tire size to that wheel before comparing brands or tread patterns.
What size rim does a 2013 GMC Trucks Acadia use?
The 2013 GMC Trucks Acadia appears with 18-inch, 19-inch, and 20-inch rim diameters. Those rim sizes correspond to 255/65R18, 255/60R19, and 255/55R20 tires, all in radial construction.
Rim diameter is the key fitment checkpoint because tires with similar overall dimensions still cannot be mounted on the wrong wheel size. Checking the wheel itself is especially worthwhile on vehicles that may have seen replacement wheels, upgraded trims, or take-off wheel packages from another Acadia configuration.
Do all 2013 GMC Trucks Acadia sub-models use the same tire size?
No. The 2013 GMC Trucks Acadia Denali uses 255/55R20, while the SL and SLE can use either 255/55R20 or 255/65R18. The SLT uses either 255/55R20 or 255/60R19, so fitment changes by sub-model and wheel setup.
That variation means the trim badge alone is helpful, but the wheel diameter still needs to be confirmed before buying tires. Two Acadias parked side by side can look close in overall tire height while still requiring different sizes because the rim diameter and sidewall profile are not the same.
Choosing the Right Tire
What should I consider when choosing a 255/55R20 tire for a 2013 GMC Trucks Acadia?
Start with the basics: the vehicle must actually use the 255/55R20 size and a 20-inch wheel. On a 2013 GMC Trucks Acadia, that size appears on the Denali and on certain SL, SLE, and SLT configurations, so the wheel package matters as much as the trim level.
After size confirmation, compare the tire’s intended use, whether the Acadia sees mostly highway miles, family commuting, or seasonal travel. It also helps to inspect the current wheels for width, condition, and any signs of prior changes, since replacement-wheel setups can affect how confidently a new 20-inch tire can be selected.
What should I consider when choosing a 255/65R18 tire for a 2013 GMC Trucks Acadia?
A 255/65R18 tire is the correct choice only when the 2013 GMC Trucks Acadia is equipped with the 18-inch wheel application. This size appears on certain SL and SLE configurations, and it keeps the Acadia within its intended radial metric fitment family.
Selection should focus on matching the actual wheel diameter first, then thinking about ride priorities such as everyday comfort, road-trip use, and weather exposure. Looking over tread wear on the old set can also reveal alignment or suspension issues, which is useful before installing another set in the same 18-inch size.
How do I choose between the available tire sizes for a 2013 GMC Trucks Acadia?
The choice is not between three interchangeable sizes. A 2013 GMC Trucks Acadia uses 255/65R18, 255/60R19, or 255/55R20 depending on sub-model and wheel diameter, so the correct size is determined by the wheel currently on the vehicle.
Once the rim diameter is confirmed, the remaining decision becomes choosing the right tire within that exact size rather than moving across sizes. Checking the tire placard, reading the sidewall on the current tires, and verifying whether the wheels are original or later replacements can prevent an expensive fitment mistake.
Restoration & Appearance
Does correct tire fitment matter for a 2013 GMC Trucks Acadia restoration?
Yes. Even on a newer collector-era vehicle or a carefully preserved original, correct tire fitment still matters because the 2013 GMC Trucks Acadia uses different wheel diameters across its trim range. Keeping the proper 18-inch, 19-inch, or 20-inch size preserves the intended stance and avoids mismatching tire size to wheel.
Appearance is only part of the equation. The right fitment also supports proper mounting, maintains the intended relationship between sidewall profile and wheel diameter, and helps avoid clearance problems caused by guessing across sizes. For a highly original vehicle, confirming the current wheel setup before replacement is a worthwhile extra step.
Which tire should I choose for a period-style 2013 GMC Trucks Acadia?
A period-style approach starts with using the exact tire size that belongs on the vehicle’s wheel package: 255/65R18, 255/60R19, or 255/55R20. Since the 2013 GMC Trucks Acadia is a modern radial-fitment vehicle, staying within the correct metric radial size is the clearest way to preserve the proper look.
That usually means avoiding the temptation to jump to a different wheel diameter just because another Acadia trim used it. A clean, well-matched tire in the proper size will generally look more appropriate than a mismatched setup, especially on an Acadia being kept close to its original road-going presentation.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 GMC Trucks Acadia?
Yes. A 2013 GMC Trucks Acadia may have started with one of several wheel and tire combinations, so aftermarket wheels, suspension changes, or body modifications can affect what fits safely and cleanly. Even when overall tire height looks close, the wheel diameter still has to match the tire exactly.
Wheel width, offset, and steering clearance become more important once a vehicle has been altered from its original setup. Looking at the wheel markings, checking clearance at full lock, and comparing the current installation side to side can help confirm whether the existing combination should be duplicated or reconsidered.
What should I inspect before driving a 2013 GMC Trucks Acadia on new tires?
Before putting a 2013 GMC Trucks Acadia into regular service on new tires, inspect the wheels for damage, confirm air pressure, and make sure the tire size matches the rim diameter. It is also smart to check valve stems, lug torque, and the general condition of brakes and suspension components.
A short initial drive can reveal vibration, pull, or contact issues that were not obvious during installation. Looking again for even clearance around the strut, fender liner, and steering components is worthwhile, especially if the Acadia has replacement wheels or if the old tires showed unusual wear patterns.
How often should tires on a 2013 GMC Trucks Acadia be inspected?
Tires on a 2013 GMC Trucks Acadia should be inspected regularly, not just when tread appears low. Monthly pressure checks, routine visual inspection for cracking, cuts, bulges, or uneven wear, and a closer look before longer trips are all sensible habits for a vehicle that may alternate between daily use and extended parking.
Consistent inspection matters because crossovers often carry passengers, cargo, and highway miles that place steady demand on the tires. Watching for slow air loss and shoulder wear can also help catch alignment or suspension issues early, which protects the new tires and keeps the Acadia driving as it should.
