The 2010 GMC Trucks Acadia arrived as a full-size crossover built for families who wanted three-row space without stepping into a traditional truck-based SUV. Its broader mission was comfort, everyday road manners, and long-distance practicality, which makes correct tire sizing especially important on a vehicle of this weight and footprint. Tire fitment centers on three radial sizes: 255/65R18, 255/60R19, and 255/55R20, with size choice tied directly to the wheel diameter and sub-model. That means the real decision starts with confirming whether the Acadia is an SL, SLE, or SLT and then matching the tire to the existing wheel setup before comparing replacement options.
Which Tire Size Is Right for The 2010 GMC Trucks Acadia
The 2010 GMC Trucks Acadia uses three primary tire sizes, and the right one depends on sub-model and wheel diameter. All three are radial sizes, but they do not share the same rim size, so confirming whether the vehicle has 18-inch, 19-inch, or 20-inch wheels is the first step. Once that is settled, the choice becomes finding the right replacement tire within the correct size for the way the Acadia is equipped and used.
255/65R18 is a metric radial size in which 255 identifies the nominal section width in millimeters, 65 is the aspect ratio, R indicates radial construction, and 18 is the rim diameter in inches. On the 2010 GMC Trucks Acadia, this size is used on 18-inch wheel applications and is the fitment shared by the SL and SLE sub-models. Its overall dimensions place it in the Acadia's standard replacement range rather than as a visual or profile change. For an owner replacing worn tires, this size keeps the search focused on correct 18-inch fitment before comparing tread and service characteristics.
255/55R20 follows the same modern metric radial format, with a 255-millimeter nominal width, a 55-series profile, radial construction, and a 20-inch rim diameter. On the 2010 GMC Trucks Acadia, this size applies to certain SLT configurations equipped with 20-inch wheels. Compared with the other Acadia sizes, the key distinction is not construction but the required wheel diameter, which must match exactly. This is the size to evaluate when an SLT already carries 20-inch wheels and the goal is to maintain the existing wheel-and-tire package rather than change wheel size.
255/60R19 is another modern metric radial size, combining a 255-millimeter nominal width with a 60-series profile on a 19-inch rim. For the 2010 GMC Trucks Acadia, it is used on certain SLT models fitted with 19-inch wheels. The practical meaning is simple: a 19-inch Acadia wheel requires this size family rather than the 18-inch or 20-inch alternatives used elsewhere in the lineup. It is the right starting point when preserving the SLT's existing 19-inch setup and avoiding unnecessary fitment problems caused by choosing a tire for the wrong wheel diameter.
Sub-model fitment on the 2010 GMC Trucks Acadia is straightforward for SL and SLE, but SLT requires closer attention because it appears with two different wheel-and-tire combinations. Checking the exact sub-model and actual wheel diameter keeps the replacement search on the right path.
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2010 GMC Trucks Acadia SL
The 2010 GMC Trucks Acadia SL uses the 255/65R18 radial size on an 18-inch wheel setup. Tire selection is mainly about staying with the correct 18-inch metric radial fitment and then choosing the replacement tire that suits the vehicle's intended road use.
The 2010 GMC Trucks Acadia SLE also uses the 255/65R18 radial size, matching the SL's 18-inch wheel fitment. That keeps replacement straightforward, as long as the vehicle still carries its proper wheel diameter and has not been changed to an aftermarket setup.
The 2010 GMC Trucks Acadia SLT can use either a 255/60R19 or 255/55R20 radial tire, depending on which wheel package is on the vehicle. Tire selection starts with confirming whether the SLT has 19-inch or 20-inch wheels, since the two sizes are not interchangeable across different rim diameters.
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
These FAQs focus on the exact tire sizes used on the 2010 GMC Trucks Acadia, how those sizes relate to SL, SLE, and SLT fitment, and what to inspect before choosing replacement tires or putting the vehicle back into regular road use.
Tire Size & Fitment
What tire size fits a 2010 GMC Trucks Acadia?
The 2010 GMC Trucks Acadia uses three primary tire sizes: 255/65R18, 255/60R19, and 255/55R20. The SL and SLE use 255/65R18, while the SLT uses either 255/60R19 or 255/55R20 depending on the wheel package installed on that particular vehicle.
The most important step is matching the tire size to the wheel diameter already on the Acadia. An 18-inch tire only works with an 18-inch rim, and the same rule applies to 19-inch and 20-inch setups. If the vehicle has changed hands or has aftermarket wheels, check the sidewall and the wheel before ordering replacement tires.
What size rim does a 2010 GMC Trucks Acadia use?
A 2010 GMC Trucks Acadia can use 18-inch, 19-inch, or 20-inch rims, depending on sub-model and wheel package. The 255/65R18 size mounts to an 18-inch rim, 255/60R19 mounts to a 19-inch rim, and 255/55R20 mounts to a 20-inch rim.
Rim diameter is the first fitment point to confirm because tire size selection follows it directly. Even though these Acadia sizes have very similar overall dimensions, the bead diameter must match the wheel exactly. It is also smart to confirm the actual wheel on the vehicle, especially if the Acadia has had replacement wheels installed at some point.
Do all 2010 GMC Trucks Acadia sub-models use the same tire size?
No, all 2010 GMC Trucks Acadia sub-models do not use the same tire size. The SL and SLE use 255/65R18, while the SLT uses either 255/60R19 or 255/55R20. The difference comes from the wheel diameter fitted to the specific sub-model configuration.
That means sub-model name alone is helpful, but it is still wise to check the wheels actually on the vehicle. An SLT can be on 19-inch or 20-inch rims, so the tire size must match the installed wheel package rather than a guess. Reading the current sidewall and measuring wheel diameter removes most fitment uncertainty before replacement.
Choosing the Right Tire
What should I consider when choosing a 255/65R18 tire for a 2010 GMC Trucks Acadia?
A 255/65R18 tire is the correct size for 2010 GMC Trucks Acadia SL and SLE models equipped with 18-inch wheels. The first considerations are keeping the exact size, confirming the wheel is still 18 inches in diameter, and choosing a radial tire suited to the vehicle's weight, passenger use, and normal road duty.
Beyond size, compare the tire's intended service character, load capability, and overall replacement role. A family crossover like the Acadia benefits from a tire that matches its daily-use mission rather than an aggressive style chosen only by appearance. Checking current tire wear patterns can also reveal alignment or suspension issues before new tires go on.
What should I consider when choosing a 255/60R19 or 255/55R20 tire for a 2010 GMC Trucks Acadia SLT?
The right starting point for a 2010 GMC Trucks Acadia SLT is confirming whether the vehicle has 19-inch or 20-inch wheels. A 255/60R19 belongs on the 19-inch setup, while a 255/55R20 belongs on the 20-inch setup. Both are radial sizes, but each is tied to a different wheel diameter.
Once wheel diameter is confirmed, focus on selecting a replacement tire that preserves the existing package rather than mixing sizes across rim types. It also helps to inspect the wheel for any previous changes, damage, or nonstandard fitment. That approach keeps the Acadia's replacement decision centered on correct geometry instead of trial-and-error tire selection.
How do I choose between the available tire sizes for a 2010 GMC Trucks Acadia?
The 2010 GMC Trucks Acadia does not use multiple sizes as a matter of preference on the same wheel. The correct size is determined by sub-model and wheel diameter: 255/65R18 for SL and SLE, and either 255/60R19 or 255/55R20 for SLT depending on the installed rim size.
Choosing between them really means identifying what is already on the vehicle rather than deciding which size looks best. Check the sidewall, verify the wheel diameter, and confirm whether the Acadia still has its original wheel package. Once the correct size is established, comparison becomes much simpler because every suitable replacement stays within that exact fitment.
Restoration & Appearance
Does correct tire fitment matter for a 2010 GMC Trucks Acadia restoration or refurbishment?
Yes, correct tire fitment still matters on a 2010 GMC Trucks Acadia even when the goal is a clean refurbishment rather than a vintage restoration. Using the proper 255/65R18, 255/60R19, or 255/55R20 size keeps the vehicle aligned with its intended wheel package and preserves the look and stance associated with that configuration.
Appearance is only one part of the decision. An Acadia with the wrong rim diameter or mismatched tire size can create clearance, handling, and replacement consistency issues. Anyone aiming for an orderly, stock-style presentation should confirm the sub-model, inspect the installed wheels, and keep all four tires in the correct size family for that setup.
Which tire should I choose for a stock-style 2010 GMC Trucks Acadia appearance?
A stock-style appearance starts with using the exact tire size that matches the Acadia's wheel package. That means 255/65R18 on SL and SLE models, or 255/60R19 or 255/55R20 on SLT models depending on whether the vehicle carries 19-inch or 20-inch wheels.
Keeping the original size family is usually more important than chasing a cosmetic change through a different profile. Oversize or undersize replacements can alter the visual balance of the Acadia even when they seem close on paper. The cleanest result comes from confirming the wheel diameter first and then selecting a proper replacement tire within that exact size.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2010 GMC Trucks Acadia?
Yes, modifications can affect tire fitment on a 2010 GMC Trucks Acadia. Aftermarket wheels, suspension changes, lowering, spacer use, or body alterations can change the space available around the tire even when the sidewall still shows one of the original sizes such as 255/65R18, 255/60R19, or 255/55R20.
That is why wheel diameter alone is not the only thing to verify on a modified vehicle. Wheel width, offset, steering clearance, and fender space should all be checked before mounting replacement tires. A careful inspection is especially worthwhile if the Acadia has uneven wear, rubbing marks, or a stance that differs from a standard factory-height setup.
What should I inspect before driving a 2010 GMC Trucks Acadia on new tires?
Before driving a 2010 GMC Trucks Acadia on new tires, inspect the wheels for damage, confirm the tire size matches the wheel diameter, and make sure the tires are inflated properly. It is also smart to look at the suspension, steering components, and alignment if the old tires showed irregular wear.
A short road test should include listening for rubbing, vibration, or pull that was not present before installation. Recheck pressure after the first period of driving and look for any signs of contact near the inner fender or suspension. Taking those steps helps new tires wear evenly and gives the Acadia a cleaner, more predictable return to road use.
How often should tires on a 2010 GMC Trucks Acadia be inspected?
Tires on a 2010 GMC Trucks Acadia should be inspected regularly, not just when tread looks low. Monthly pressure checks are a sensible routine, and visual inspections should look for cracking, cuts, bulges, punctures, and uneven wear across all four tires, regardless of whether the vehicle uses 18-inch, 19-inch, or 20-inch fitment.
Inspection becomes even more important on an Acadia that sits for long periods or is used mainly for shorter trips. Tires can age, lose air, or develop wear patterns long before they appear obviously worn out. Looking them over before longer drives and during routine service helps catch problems early and supports more consistent, safer road behavior.
