The 2019 Buick Trucks Enclave sits in the modern full-size crossover segment, blending three-row family space with the quiet, upscale road manners Buick buyers expect. It is a vehicle often chosen for comfortable highway use, everyday hauling, and long-distance travel rather than purely sporty driving. Tire selection for the 2019 Buick Trucks Enclave centers on two primary radial sizes, 255/55R20 and 255/65R18, depending on sub-model and wheel package. That means the key decision is not vintage-style construction or period appearance, but confirming the exact wheel diameter first and then choosing the right radial tire for ride, load support, and everyday road use.
Which Tire Size Is Right for The 2019 Buick Trucks Enclave
The 2019 Buick Trucks Enclave uses two primary tire sizes, and the correct one depends on the sub-model and wheel setup. Both are radial metric sizes, but they mount on different rim diameters, so confirming whether the vehicle has 18-inch or 20-inch wheels is the first step before comparing tire choices, ride preferences, or replacement options.
255/55R20 is a modern metric radial size in which 255 identifies the section width in millimeters, 55 is the aspect ratio, R marks radial construction, and 20 is the rim diameter in inches. On the 2019 Buick Trucks Enclave, this size is tied to the 20-inch wheel package and is used on the Avenir as well as some other sub-model configurations. Its dimensions keep it in the same general overall height range as the 18-inch fitment, but wheel diameter is different. Choose this size only after confirming the vehicle is actually equipped with 20-inch rims.
255/65R18 is also a modern metric radial size, with the same 255-millimeter section width but a taller 65-series sidewall and an 18-inch rim diameter. For the 2019 Buick Trucks Enclave, this size applies to 18-inch wheel configurations used on several sub-models. It offers a straightforward OE-style modern sizing format that most current buyers will recognize easily. This is the size to evaluate when the Enclave has 18-inch wheels and you want to stay with the proper rim diameter rather than moving into the 20-inch fitment.
Tire fitment on the 2019 Buick Trucks Enclave varies by sub-model and wheel package rather than following one size across the board. Checking the exact trim matters because the Avenir stays with one size, while Essence, Preferred, and Premium may use either the 18-inch or 20-inch fitment.
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2019 Buick Trucks Enclave Avenir
The 2019 Buick Trucks Enclave Avenir uses the 255/55R20 radial size. For tire selection, that makes wheel confirmation simple, and the focus shifts to choosing a replacement that matches the vehicle's 20-inch setup and intended daily road use.
The 2019 Buick Trucks Enclave Essence can use either 255/55R20 or 255/65R18, depending on how the vehicle was equipped. That means tire selection starts with verifying the actual wheel diameter on the vehicle before comparing replacement choices.
The 2019 Buick Trucks Enclave Preferred may be fitted with either 255/55R20 or 255/65R18 radial tires. The practical step is to confirm whether the vehicle carries 18-inch or 20-inch wheels, since the two sizes are not interchangeable simply because they are both Enclave fitments.
The 2019 Buick Trucks Enclave Premium can use 255/55R20 or 255/65R18, depending on the wheel package. Tire replacement should begin with the exact rim diameter already on the vehicle, then move to choosing the right radial tire for load, comfort, and normal driving use.
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
Common questions for the 2019 Buick Trucks Enclave usually come down to confirming the right tire size by sub-model, understanding the 18-inch versus 20-inch wheel setups, and checking fitment, condition, and maintenance before regular road use.
Tire Size & Fitment
What tire size fits a 2019 Buick Trucks Enclave?
The 2019 Buick Trucks Enclave uses either 255/55R20 or 255/65R18 radial tires. The correct size depends on the sub-model and wheel package, with the Avenir using 255/55R20 and the Essence, Preferred, and Premium using either size depending on configuration.
The most important next step is confirming the actual wheel diameter on the vehicle before ordering tires. Even though both sizes are valid Enclave fitments, one is for an 18-inch rim and the other is for a 20-inch rim, so checking the door placard, current tire sidewall, and wheel itself helps prevent an avoidable mismatch.
What size rim does a 2019 Buick Trucks Enclave use?
A 2019 Buick Trucks Enclave uses either an 18-inch or 20-inch rim, depending on trim and wheel setup. The 255/65R18 tire mounts on an 18-inch rim, while the 255/55R20 tire mounts on a 20-inch rim.
Rim diameter is the first fitment detail to verify because it determines which of the two Enclave tire sizes belongs on the vehicle. If the Enclave has had wheels changed at some point, rely on the actual wheel and tire size currently installed rather than assuming the trim alone still reflects the original setup.
Do all 2019 Buick Trucks Enclave sub-models use the same tire size?
No, not all 2019 Buick Trucks Enclave sub-models use the same tire size. The Avenir uses 255/55R20, while the Essence, Preferred, and Premium can use either 255/55R20 or 255/65R18 depending on wheel package.
That variation means the sub-model name helps narrow the fitment, but it may not answer the whole question on its own. On Essence, Preferred, and Premium models, the actual wheel diameter still needs to be checked before choosing a replacement tire, especially if the vehicle has been fitted with a different factory-style wheel package or aftermarket wheels.
Choosing the Right Tire
What should I consider when choosing a 255/55R20 tire for a 2019 Buick Trucks Enclave?
Start with confirming that the Enclave is actually equipped with 20-inch wheels and that 255/55R20 is the current fitment. This size is used on the 2019 Buick Trucks Enclave Avenir and on certain other Enclave configurations equipped with the 20-inch wheel package.
After size confirmation, compare tires based on load suitability, intended road use, ride preference, and the condition of the wheels and suspension. A three-row crossover places different demands on tires than a lightly used collector car, so it is worth checking for even tread wear, proper inflation habits, and any signs that alignment or suspension issues may affect the next set.
What should I consider when choosing a 255/65R18 tire for a 2019 Buick Trucks Enclave?
The first consideration is making sure the vehicle has the 18-inch wheel setup, because 255/65R18 is the Enclave's 18-inch radial fitment. This size is used on certain 2019 Buick Trucks Enclave Essence, Preferred, and Premium configurations.
Once the wheel diameter is confirmed, focus on how the Enclave is used day to day. Family hauling, highway travel, and regular commuting all place importance on stable load handling, predictable road manners, and proper maintenance, so the best choice is usually the one that matches the vehicle's intended use without changing the established size.
How do I choose between the available tire sizes for a 2019 Buick Trucks Enclave?
The choice is not based on preference alone, because the 2019 Buick Trucks Enclave's two sizes correspond to different wheel diameters. Use 255/65R18 if the vehicle has 18-inch rims and 255/55R20 if it has 20-inch rims.
Once that is settled, the comparison becomes more practical: how the Enclave is driven, whether the current setup is original to the vehicle, and whether the wheels, suspension, and alignment are in good condition. Matching the correct size to the actual rim matters more than trying to choose between the two sizes as if both automatically apply to every Enclave.
Restoration & Appearance
Does correct tire fitment matter for a 2019 Buick Trucks Enclave restoration?
Yes, correct tire fitment still matters even on a modern vehicle like the 2019 Buick Trucks Enclave. Using the proper 255/55R20 or 255/65R18 size for the actual wheel setup helps preserve the intended stance, wheel-to-tire proportion, and everyday drivability of the vehicle.
For an owner bringing an Enclave back to clean original-style condition, confirming the exact trim and wheel package is an important starting point. If authenticity matters beyond basic fitment, compare the current wheels and tire size against factory labeling on the vehicle and other trim-specific references before changing the setup.
How does tire size affect the appearance of a 2019 Buick Trucks Enclave?
Tire size has a visible effect on the look of a 2019 Buick Trucks Enclave because 255/65R18 and 255/55R20 are paired with different wheel diameters. Even though the two sizes are close in overall height, the sidewall-to-wheel proportion changes the vehicle's visual presentation.
That makes it important to keep the tire matched to the wheel package already on the vehicle if the goal is an original-style appearance. Changing wheel diameter alters the Enclave's look immediately, so buyers who care about presentation should verify whether the vehicle is meant to wear the 18-inch or 20-inch setup before replacing tires.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2019 Buick Trucks Enclave?
Yes, modifications can affect tire fitment on a 2019 Buick Trucks Enclave. Aftermarket wheels, suspension changes, lowering, altered offsets, or body modifications can all change how a 255/55R20 or 255/65R18 tire sits in the wheel opening and how much clearance remains during steering and suspension travel.
A modified Enclave should be checked more carefully than an unaltered one before replacing tires. Verifying wheel diameter, wheel width, offset, and clearance at full turn helps avoid rubbing or contact issues, especially when the vehicle no longer matches its original trim-level setup.
What should I inspect before driving a 2019 Buick Trucks Enclave on new tires?
Before driving a 2019 Buick Trucks Enclave on new tires, inspect the wheels for damage, confirm the tire size matches the rim diameter, and check inflation pressure. It is also smart to look over the alignment, suspension condition, and brake components so the new tires are not immediately affected by an existing problem.
A short test drive should be followed by another quick inspection for vibration, uneven seating, air loss, or any sign of interference. Catching those issues early matters on a heavier family crossover, because small fitment or maintenance problems can turn into uneven wear and reduced ride quality fairly quickly.
How often should tires on a 2019 Buick Trucks Enclave be inspected?
Tires on a 2019 Buick Trucks Enclave should be inspected regularly, not just when they look obviously worn. Monthly pressure checks and routine visual inspections for cracking, cuts, bulges, embedded debris, and uneven tread wear are sensible habits for a vehicle that sees family use and highway miles.
A closer inspection is especially worthwhile before longer trips or after seasonal temperature swings. The Enclave's size and typical passenger-carrying role make tire condition important for comfort and predictable road manners, so catching slow air loss or irregular wear early can prevent bigger problems later.
