The 2017 Buick LaCrosse sits firmly in Buick’s modern full-size sedan tradition, blending quiet highway comfort with more contemporary wheel and tire proportions than earlier generations. For buyers replacing tires on one of these cars today, the main fitment question is tied to trim and wheel package rather than vintage sizing conventions. This model uses radial tires in either 235/50R18 or 245/40R20, depending on the exact sub-model and wheel setup. Available choices include Blackwall, Redline, and raised white letter styling across several performance-oriented series. The right selection comes down to confirming the car’s actual wheel diameter first, then balancing appearance, driving use, and replacement style.
Which Tire Size Is Right for The 2017 Buick LaCrosse
The 2017 Buick LaCrosse uses two primary tire sizes, and the difference comes down to sub-model and wheel diameter. Some versions use 18-inch wheels with 235/50R18 tires, while others can also use 20-inch wheels with 245/40R20 tires. Before choosing a tire, confirm the exact sub-model and make sure the car is still on its correct wheel size, especially if wheels have been changed at some point.
235/50R18 is a metric radial size in which 235 identifies the nominal section width in millimeters, 50 is the aspect ratio, R marks radial construction, and 18 is the wheel diameter in inches. On the 2017 Buick LaCrosse, this size serves the cars equipped with the 18-inch wheel setup and keeps the fitment in a fully modern radial format. Available choices include BFGoodrich, Nitto, and Pro-Trac options, with Blackwall, Redline, and RWL sidewall treatments across series such as g-Force and Street Pro III. It is the size to evaluate when maintaining the standard 18-inch wheel package and its original overall fitment character.
245/40R20 is also a metric radial size, with 245 indicating nominal section width in millimeters, 40 describing the aspect ratio, and 20 identifying the wheel diameter in inches. On the 2017 Buick LaCrosse, this size is tied to the larger 20-inch wheel configuration used on certain trims and wheel packages. Product choices include BFGoodrich, Nitto, and Pro-Trac offerings, with Blackwall, Redline, and RWL sidewall styles available in several modern tire series. This is the size to confirm when the car carries the factory-style 20-inch presentation or a matching 20-inch replacement wheel setup.
Tire fitment on the 2017 Buick LaCrosse varies by sub-model and wheel package, so trim identification matters before anything else. Base and Preferred models stay straightforward, while Essence and Premium versions can appear with either of the vehicle’s two primary tire sizes.
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2017 Buick LaCrosse Base
The 2017 Buick LaCrosse Base uses the 235/50R18 radial tire size. Tire selection here is mostly about choosing the right 18-inch radial within that fitment, then deciding whether a Blackwall, Redline, or raised white letter presentation suits the car best.
The 2017 Buick LaCrosse Essence can use either 235/50R18 or 245/40R20, depending on the wheel setup on the car. That makes wheel-diameter confirmation especially important before replacement, since the real decision is not just tire brand but whether the car is on the 18-inch or 20-inch fitment.
The 2017 Buick LaCrosse Preferred uses the 235/50R18 radial tire size. With fitment limited to the 18-inch setup, the choice shifts toward comparing available tire series, sidewall appearance, and other product details within the correct size.
The 2017 Buick LaCrosse Premium can use either 235/50R18 or 245/40R20, depending on how the car is equipped. Replacing tires on this sub-model starts with confirming the actual wheel diameter on the vehicle, then matching the new tire to that configuration and intended appearance.
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.
Best 2017 Buick LaCrosse Tires for Sale
Available 2017 Buick LaCrosse tire choices span 235/50R18 and 245/40R20 radials from BFGoodrich, Nitto, and Pro-Trac. Buyers can compare Blackwall, Redline, and RWL styling along with series such as g-Force, NT555 G2, and Street Pro III.
Tire questions for the 2017 Buick LaCrosse usually come down to confirming whether the car uses 18-inch or 20-inch wheels, then comparing radial tire choices, sidewall styles, and practical fitment checks before road use.
Tire Size & Fitment
What tire size fits a 2017 Buick LaCrosse?
The 2017 Buick LaCrosse uses either 235/50R18 or 245/40R20 radial tires. Base and Preferred models use 235/50R18, while Essence and Premium models can use 235/50R18 or 245/40R20 depending on the wheel package installed on the car.
The key step is confirming the actual wheel size on the vehicle before ordering tires. An Essence or Premium model may not match another car with the same trim badge, so checking the current wheel diameter and the tire size already mounted helps prevent choosing an 18-inch tire for a 20-inch wheel, or the reverse.
What size rim does a 2017 Buick LaCrosse use?
The 2017 Buick LaCrosse uses either an 18-inch or 20-inch rim, depending on the tire size and sub-model setup. The 235/50R18 tire fits an 18-inch wheel, while the 245/40R20 tire fits a 20-inch wheel.
Rim diameter is the first fitment point to verify because a tire must match the wheel’s diameter exactly. Once that is confirmed, it also helps to compare wheel width against the tire’s intended rim-width range, especially if the car has aftermarket wheels or a replacement wheel package that differs from its original configuration.
Why does the 2017 Buick LaCrosse have more than one tire size?
The 2017 Buick LaCrosse has more than one tire size because fitment varies by sub-model and wheel package. Some cars use the 18-inch 235/50R18 setup, while others are equipped with the lower-profile 245/40R20 size on 20-inch wheels.
That means tire replacement should start with the car’s present wheel and tire configuration, not the model name alone. Trim level helps narrow the choices, but a visual wheel check and a look at the sidewall size marking are still the safest way to confirm which of the two primary LaCrosse fitments the car actually uses.
Choosing the Right Tire
What should I consider when choosing a 2017 Buick LaCrosse tire?
Start with the correct size for the car’s wheel setup: 235/50R18 or 245/40R20. From there, compare construction details within the available radial choices, including brand, tire series, sidewall style, and practical specs such as rim-width compatibility, weight, and load figures where they are given.
The right choice depends on how the LaCrosse is used and how you want it to look. A buyer focused on a clean modern appearance may prefer a Blackwall, while someone wanting a more distinctive presentation may look at Redline or raised white letter options, provided the tire matches the wheel and overall fitment needs.
What sidewall styles are available for 2017 Buick LaCrosse tires?
2017 Buick LaCrosse tires are available in Blackwall, Redline, and RWL sidewall styles, depending on the size and product line. Those choices appear in both 235/50R18 and 245/40R20, giving the car either a restrained modern look or a more assertive performance-oriented visual treatment.
Sidewall style does not change the required tire size, so the visual decision comes after the fitment decision. Once the correct wheel diameter and tire size are confirmed, sidewall treatment becomes a useful way to shape the car’s appearance without moving away from the proper radial size for that particular LaCrosse setup.
What brands offer tires for the 2017 Buick LaCrosse?
BFGoodrich, Nitto, and Pro-Trac offer tires for the 2017 Buick LaCrosse in the applicable 235/50R18 and 245/40R20 sizes. Across those brands, the available series include g-Force Sport Comp 2, g-Force Comp 2 AS, g-Force Phenom T/A, Nitto NT555 G2, and Pro-Trac Street Pro III.
Brand choice is most useful when compared alongside tire series, sidewall style, and wheel compatibility rather than as a name-only decision. Once the correct LaCrosse size is confirmed, the product grid becomes a way to compare whether you want a Blackwall performance look, a Redline treatment, or an RWL presentation in the proper fitment.
Restoration & Appearance
Which tire should I choose for a period-style 2017 Buick LaCrosse?
A period-style approach for a 2017 Buick LaCrosse still starts with the correct modern radial size for the car’s wheel package, either 235/50R18 or 245/40R20. Within those sizes, appearance-focused choices such as Pro-Trac Street Pro III in Redline or RWL can give the car a more distinctive visual character than a standard Blackwall.
That decision is more about presentation than strict originality, so the best path is to match the tire’s look to the way the car is being preserved or displayed. Buyers chasing a showroom-like modern sedan appearance may stay with Blackwall, while a custom or enthusiast build may suit one of the styled sidewall treatments.
How does tire construction affect the appearance of a restored 2017 Buick LaCrosse?
On the 2017 Buick LaCrosse, construction does not create a bias-ply-versus-radial appearance decision because the applicable fitments are radial. The visible difference comes more from the tire’s profile within the correct size and from sidewall presentation, such as Blackwall, Redline, or RWL.
That makes wheel size and sidewall treatment the bigger styling tools on this car. An 18-inch setup with 235/50R18 presents differently from a 20-inch setup with 245/40R20, so preserving the intended look means confirming the actual wheel package first and then choosing a sidewall style that suits the finished vehicle.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2017 Buick LaCrosse?
Yes, modifications can affect tire fitment on a 2017 Buick LaCrosse even when the tire size sounds correct on paper. Aftermarket wheels, wheel-width changes, altered offset, suspension lowering, or body modifications can all change how a 235/50R18 or 245/40R20 tire sits within the wheelwell.
A car that has been changed from its original setup should be checked at full steering lock and through suspension travel before settling on a replacement tire. Wheel diameter, width, and clearance around struts and fenders matter just as much as the sidewall size marking when the LaCrosse is no longer stock.
What should I inspect before driving a 2017 Buick LaCrosse on new tires?
Before driving a 2017 Buick LaCrosse on new tires, inspect wheel condition, verify tire pressure, and confirm that all four tires match the intended size for the car’s wheel setup. It is also wise to look for proper bead seating, valve-stem condition, and any obvious interference around the suspension or inner fender.
A short, careful road test is a smart follow-up after installation. Listen for rubbing, watch for vibration, and recheck inflation after the first drive, especially if the car uses 20-inch wheels or replacement wheels that differ from the original package. Small fitment problems are easier to correct before regular use begins.
How often should tires on a 2017 Buick LaCrosse be inspected?
Tires on a 2017 Buick LaCrosse should be inspected regularly, not only by mileage but also by time and storage conditions. Check for tread wear, uneven wear patterns, punctures, cuts, sidewall cracking, bulges, and air loss, especially if the car is driven infrequently or spends long periods parked.
A quick visual inspection before routine driving and a more thorough check before longer trips helps catch problems early. Cars that sit can age their tires without accumulating much mileage, so pressure checks and condition checks matter just as much as tread depth when keeping a modern full-size sedan safe and road-ready.
