The 2007 GMC Trucks Acadia arrived as a full-size crossover built for family use, long-distance comfort, and the higher seating position that defined the segment in the late 2000s. Its tire fitment reflects that balance of road manners and utility, with two primary radial sizes used across the model line: 255/65R18 and 255/60R19. The key decision is less about vintage construction and more about confirming the correct wheel diameter for the exact Acadia setup, especially on SLT models that could use either size. Once that is settled, the focus shifts to maintaining the intended proportions, preserving clearance, and choosing a tire that suits everyday driving and the vehicle’s wheel package.
Which Tire Size Is Right for The 2007 GMC Trucks Acadia
The 2007 GMC Trucks Acadia uses two primary tire sizes, and the difference comes down to wheel diameter and sub-model configuration. Both are radial sizes with the same overall diameter and section width, but one fits an 18-inch rim and the other fits a 19-inch rim. Before selecting a tire, confirm the exact sub-model and, just as importantly, verify whether the vehicle is currently equipped with 18-inch or 19-inch wheels.
255/65R18 is a metric radial size in which 255 identifies the nominal section width in millimeters, 65 is the aspect ratio, R denotes radial construction, and 18 is the wheel diameter in inches. On the 2007 GMC Trucks Acadia, this size is one of the primary fitments and is used on 18-inch wheels. It suits buyers who need to stay with the Acadia’s 18-inch wheel setup while preserving the intended tire proportions. Checking the actual wheel diameter on the vehicle matters, especially if wheels have been changed over time.
255/60R19 follows the same metric radial sizing format, with a 255-millimeter nominal section width, a 60-series profile, radial construction, and fitment for a 19-inch wheel. On the 2007 GMC Trucks Acadia, this size applies to configurations that use 19-inch rims rather than 18-inch rims. Its overall diameter closely matches the other primary Acadia size, but the wheel requirement is different and must be confirmed first. This is the size to evaluate when the vehicle retains its 19-inch wheel package or has been equipped with the matching rim diameter.
Sub-model fitment matters on the 2007 GMC Trucks Acadia because tire size is tied to configuration and wheel diameter. The SLE uses one straightforward size, while the SLT can appear with either of the two primary radial sizes, making wheel confirmation especially important before replacement.
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2007 GMC Trucks Acadia SLE
The 2007 GMC Trucks Acadia SLE uses the 255/65R18 radial size. That makes replacement selection relatively direct, with the main job being to confirm that the vehicle still has its 18-inch wheels and has not been changed to a different wheel package.
The 2007 GMC Trucks Acadia SLT can use either 255/60R19 or 255/65R18, depending on the wheel setup. Tire selection for an SLT starts with verifying the actual rim diameter on the vehicle, since both sizes share similar proportions but fit 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 about 2007 GMC Trucks Acadia tires usually center on which of the two radial sizes applies, how SLE and SLT fitment differs, and what to inspect on the wheels and suspension before putting the vehicle back into regular road use.
Tire Size & Fitment
What tire size fits a 2007 GMC Trucks Acadia?
A 2007 GMC Trucks Acadia uses one of two primary radial tire sizes: 255/65R18 or 255/60R19. The SLE uses 255/65R18, while the SLT can use either 255/65R18 or 255/60R19 depending on the wheel package on the vehicle.
The practical difference is wheel diameter, not a change in tire construction, since both are radial sizes. Checking the exact sub-model helps, but the final confirmation should come from the actual wheels on the Acadia, especially on an SLT that may have either 18-inch or 19-inch rims.
What size rim does a 2007 GMC Trucks Acadia use?
The 2007 GMC Trucks Acadia uses either an 18-inch rim or a 19-inch rim, depending on the tire size installed. The 255/65R18 tire fits an 18-inch wheel, and the 255/60R19 tire fits a 19-inch wheel.
Rim diameter is the first fitment detail to verify before ordering replacement tires. Even though the two Acadia sizes share the same overall diameter, a 19-inch tire cannot be mounted on an 18-inch wheel, and an 18-inch tire cannot be mounted on a 19-inch wheel.
Do all 2007 GMC Trucks Acadia sub-models use the same tire size?
No. The 2007 GMC Trucks Acadia SLE uses 255/65R18, while the SLT can use either 255/65R18 or 255/60R19. That means tire size is not identical across every covered Acadia configuration.
This matters most when replacing tires on an SLT, because the trim name alone does not narrow it to one size. A quick check of the current wheel diameter and the size already on the vehicle helps prevent choosing a tire that matches the model year but not the actual wheel setup.
Choosing the Right Tire
What should I consider when choosing a 255/65R18 tire for a 2007 GMC Trucks Acadia?
Start by confirming that the 2007 GMC Trucks Acadia actually has 18-inch wheels, since 255/65R18 is the correct size only for that wheel diameter. This size is used on the SLE and also appears on some SLT configurations, so trim alone is not always enough.
After size confirmation, compare the tire’s overall suitability for the vehicle’s use, including load needs, everyday road driving, and wheel condition. It also helps to inspect for prior wheel changes or suspension modifications, because the right size on paper still needs to match the Acadia’s actual setup.
What should I consider when choosing a 255/60R19 tire for a 2007 GMC Trucks Acadia?
255/60R19 is the correct choice only for a 2007 GMC Trucks Acadia equipped with 19-inch wheels. It appears on certain SLT configurations, and its key fitment requirement is the matching rim diameter rather than a different construction type, since it is also a radial tire.
A smart next step is checking the wheel itself for diameter, condition, and any aftermarket change that may have altered the vehicle from its original setup. Matching the proper size to the actual rim keeps the tire’s intended proportions and helps avoid avoidable mounting or clearance issues.
How do I choose between the available 2007 GMC Trucks Acadia tire sizes?
The choice is made by the vehicle’s wheel package, not by preference alone. A 2007 GMC Trucks Acadia uses either 255/65R18 or 255/60R19, and each size is tied to its own rim diameter, so the correct tire depends on whether the vehicle has 18-inch or 19-inch wheels.
The Acadia’s two sizes share the same overall diameter and section width, which helps keep the vehicle’s proportions consistent across wheel packages. Even so, a buyer should still confirm sub-model, wheel size, and any later changes to wheels or suspension before deciding which size belongs on that specific vehicle.
Restoration & Appearance
Does correct tire fitment matter for a 2007 GMC Trucks Acadia restoration?
Yes. Even on a newer collector-era vehicle like the 2007 GMC Trucks Acadia, correct tire fitment helps preserve the way the vehicle sits, fills the wheel openings, and matches its intended wheel package. The right size is 255/65R18 or 255/60R19, depending on the exact configuration.
Appearance is only part of the decision, because proper wheel diameter still governs whether the tire belongs on the vehicle. An Acadia being returned to stock-style presentation should be checked for later wheel changes, since a trim badge alone may not confirm whether the vehicle should be on 18-inch or 19-inch rims.
How does tire construction affect the appearance of a restored 2007 GMC Trucks Acadia?
On the 2007 GMC Trucks Acadia, the primary fitments are radial tires, so construction choice is less about bias-ply versus radial appearance and more about keeping the proper modern profile for the wheel package. The visible difference comes chiefly from using the correct size on the correct rim diameter.
A restored or carefully preserved Acadia looks more consistent when the tire maintains the intended stance and proportion of the original wheel setup. Checking whether the vehicle wears 18-inch or 19-inch wheels is therefore the main appearance-related fitment step before choosing replacement tires.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2007 GMC Trucks Acadia?
Yes. A 2007 GMC Trucks Acadia that has aftermarket wheels, suspension changes, or altered ride height may no longer match the size associated with its original sub-model and wheel package. That is especially important on SLT models, which can use either 255/65R18 or 255/60R19.
Wheel diameter should be checked first, followed by basic clearance around the fenders, steering components, and suspension. Even when the tire size is one that belongs on an Acadia, a modified vehicle can create different fitment demands than a stock-height example with original-style wheels.
What should I inspect before driving a 2007 GMC Trucks Acadia on new tires?
Inspect the wheel diameter, wheel condition, valve stems, and the tire size being installed to make sure the setup matches the vehicle. It also makes sense to look over the suspension and steering for wear that could affect how a 2007 GMC Trucks Acadia tracks and carries its tires.
Tire pressure, tread seating, and any obvious signs of rubbing should be checked before regular road use. A short initial drive followed by a second inspection can help catch air loss, unusual contact marks, or mounting issues early, particularly if the Acadia has had wheel changes in the past.
How often should tires on a 2007 GMC Trucks Acadia be inspected?
Tires on a 2007 GMC Trucks Acadia should be inspected regularly, not just when tread looks worn. A visual check for cracking, cuts, bulges, uneven wear, and air loss is worthwhile before longer drives and during routine maintenance, especially on a vehicle that may not be driven every day.
Low-use vehicles can still develop age-related tire problems even when mileage is modest. Looking at tire condition, pressure retention, and wheel condition on a consistent schedule helps catch issues early and is particularly useful when the Acadia’s wheel package or tire size has changed at some point in its service life.
